For gas zenoah the flange that mounts on engine is missing the collar is for a aluminum pipe and usually has a strap that goes around the water nipple to keep pipe in place
The fun part of build cutting the slot with out making it sloppy fitting.I chuck a drill bit in collect on motor then cut three pieces of tubing stepped up to use a guide about 4 inches long I drill a hole about mid way of slot then angle the drill to make the slot then rat tail file for final fit.
Need to know the spacing on front sponsons mounted the transom hardware engine needle vavle and front sponsons need to drill the tubes and do the radio box here’s some pictures.
Here’s the eagle sg 21 from 2001 the paint has been in the basement on the top shelf found it two weeks ago I was happy it turned out I started on the lids and was happy