Fits a feed slot length = 74.8mm ( 2.94") and width = 13mm
The mast is a ZSPARS # Z230, my web chart profile D2 with a Track Depth of 15.8mm.
Build ref: Seaward 25 D2 td15.5 z230 PG930A-1
The bottom nipple pin has a 1/16" guide hole to drill mark the feed slot web for a 3/16" drop-pin hole.
You must cut grooves per video instructions:
https://youtu.be/VvgMuhgE8TI
https://youtu.be/kjJ8F6KNM1Q
Help at TomLuQue@gmail.com
Seaward 25 D2 td15.5 z230 PG930A-1