Restarting my SLC project in West Texas

[Hector]

FWIW, the directions from Shields (who is/was the manufacturer of the parts) says not to counter-sink the holes .... I've always thought the trick to avoiding cracks in the plastic is a slightly over-sized hole and then cushion the bolt head with a rubber washer .... that's how I did my windshield using 4 #6s and it's been fine for 15 years. YMMV.

thank you, I guess the only option I have at this point is to oversize the holes a bit and then cross my fingers , Cam has not had any problems with the windows cracking so far, he did the counter -sink bolts and rubber nuts