Paolo,

Welcome! I see you have received many excellent tips from the Group. You indicate that your  resin kits are mostly F&C kits. It is well known by this group that F&C's instruction sheets are not the best. I often struggle with the poor photographs and have difficulty in identifying smaller parts due to the vagueness in wording in these sheets.

So, my advice is to work slowly and, should you have any difficulty in interpreting anything in the instructions, do not hesitate to post your questions to this Group. It is a wonderful resource for solving these issues and the members are more than willing to help.

Have fun on your builds.

Jim Kubanick

Morgantown WV