Setup
Fill the sections one at a time. Items come from the Shopify product list, so prices always match the right product.
1Hole intervals (pitch, mm)
Blank = 0 (no rounding). Enter the hole pitch for each item.
2Cross-brand selection
For each item, choose the brand and the exact product in that brand. The list is the full Shopify product list.
3Compatible items (blocks / ball nuts)
Pick the main item, then add one or more compatible blocks or ball nuts from the full Shopify list.