Completed enlarging holes to #27 size in plexiglass. Also drilled #27 holes in Fuse Skins, deburred, "broke" edges, then dimpled. Sanded edges of plexiglass along aft edge with 220, then 400 grit per Step 11 & 12 in Sect 38-03. Machine C'sunk Window for .025" dimpled skin (slightly deeper req'd vs screw head only).
|  | 
| 
To dimple skin above Roll Bar Brace,  needed to use parts from C-frame. 
Access hole in Brace allowed access from underneath -  my Main Squeeze 
 from Cleaveland Tools would not work there | 
|  | 
| Edge sanded smooth, and Mach C'sunk for dimpled skin... | 
