diff --git a/components/model/item.vue b/components/model/item.vue
index 8b4906d..b03bc64 100644
--- a/components/model/item.vue
+++ b/components/model/item.vue
@@ -13,7 +13,7 @@ if (props.modelUrl) {
 scene.receiveShadow = true
 scene.castShadow = true
 
-const target = ref(props.target ? new Vector3(...props.target) : new Vector3(0, 0, 0))
+const target = ref(props.target ? new Vector3(...props.target) : null)
 
 function shadows_and_pos(scene: any) {
     scene.children.forEach((el: any) => {
@@ -37,13 +37,15 @@ type vectorType = 'x' | 'y' | 'z';
 onLoop(() => {
     if (model.value && target.value) {
         axis.forEach(element => {
-            const point = model.value.position[element.axis]
-            let step = stepbase * target.value[element.axis as vectorType]
-            if (step !== 0) {
-                if (Math.abs(point) >= Math.abs(target.value[element.axis as vectorType])) {
-                    step = 0
+            if(target.value) {
+                const point = model.value.position[element.axis]
+                let step = stepbase * target.value[element.axis as vectorType]
+                if (step !== 0) {
+                    if (Math.abs(point) >= Math.abs(target.value[element.axis as vectorType])) {
+                        step = 0
+                    }
+                    model.value[element.func](step)
                 }
-                model.value[element.func](step)
             }
         });
     }
diff --git a/components/model/parametric.vue b/components/model/parametric.vue
index 0744154..4396054 100644
--- a/components/model/parametric.vue
+++ b/components/model/parametric.vue
@@ -35,6 +35,7 @@ watch(lamelle_color, () => {
     items.forEach(element => {
         set_material(element, getColorHexFromRal(lamelle_color.value))
     });
+    set_material(lamelle, getColorHexFromRal(lamelle_color.value));
 })
 watch(pillar_color, () => {
     const items = [
@@ -47,6 +48,7 @@ watch(pillar_color, () => {
     items.forEach(element => {
         set_material(element, getColorHexFromRal(pillar_color.value))
     });
+    [top, fence, fastening].map((el: any) => { set_material(el, getColorHexFromRal(pillar_color.value)) })
 })
 watch([section_count, extra_section], () => {
     const base = seek(scene.value, 'name', 'base')
@@ -78,7 +80,7 @@ onMounted(() => {
         <template v-for="i in (section_count + ~~(!!extra_section))">
             <template v-if="i <= max_size">
                 <ModelFence :index="i"
-                    :models="{ top: top.clone(), fence: fence.clone(), fastening: fastening.clone(), lamelle }" />
+                    :models="{ top, fence, fastening, lamelle }" />
             </template>
         </template>
     </TresGroup>
diff --git a/composables/useCalc.ts b/composables/useCalc.ts
index 5eabb98..15ad0b0 100644
--- a/composables/useCalc.ts
+++ b/composables/useCalc.ts
@@ -3,14 +3,16 @@ import type { ralTypes } from '@/components/ral'
 export const predefPillarColors = ['3004', '7043', '6028', '5013', '8016', '1020', '3005', '4009']
 export const predefLamelleColors = ['3009', '9003', '6027', '5024', '9001', '1012', '3007', '4007']
 
+const n = 2
+const min = 1300
 export const use_lamelles_count = () => useState('lamelles_count', () => 14)
-export const use_fence_section = () => useState<number>('fence_section', () => 1000 * 0.001)
+export const use_fence_section = () => useState<number>('fence_section', () => min * 0.001)
 export const use_remove_pillar = () => useState<boolean>('remove_pillar', () => false)
 export const use_pillar_color = () => useState<ralTypes>('pillar_color', () => predefPillarColors[Math.floor(Math.random() * predefPillarColors.length)] as ralTypes)
 export const use_lamelle_color = () => useState<ralTypes>('lamelle_color', () => predefLamelleColors[Math.floor(Math.random() * predefLamelleColors.length)] as ralTypes)
-export const use_section_count = () => useState('section_count', () => 5)
+export const use_section_count = () => useState('section_count', () => n)
 export const use_extra_section = () => useState('extra_section', () => 0)
-export const use_total_length = () => useState('total_length', () => (1000 * 5 - 100) * 0.001)
+export const use_total_length = () => useState('total_length', () => ((min * n) - 100) * 0.001)
 export const use_min_length = () => useState('min_length', () => 1000)
 export const use_max_size = () => useState<number>('max_size', () => 13)
 export const use_explosion_state = () => useState<boolean>('explosion_state', () => false)
\ No newline at end of file