No not really, it's pretty straight forward. You will reuse all the screws from the old case for the new one. Everything is connected in a similar way as the old case. If you want I can take a couple of photos from the inside. Don't have the old case anymore so can't help you there.
thank you for your respond. I have print first piece and it looks like i have different version of scale ( https://www.aliexpress.com/item/1005003742067899.html?spm=a2g0o.order_list.order_list_main.185.2aea1802mhmAXL#nav-specification ) looks same, but internals have small differences. That's shame, because i love your design and have same problem with space on Silvia for this scale :( Anyway thank you :)