I was installing the glass in the 69 winshield frame today. I am using a VB clear windshield. The process was to install the top 3 pieces and then the bottom slid right into place! The windshields i have been using came from Special interest car parts about 15 years ago.They are long gone now. I purchased in bulk so my only experience was with their glass. They were a bit too wide. Installation was a bear!!!The thing i did today was to duct tape the front channel so the front seal lip would not enter the channel while sliding the "T" seal into place. I used a spray lube and it worked great. I also drill another hole a bit further from the post so the seal will not have to bend as much when feeding it into place.I have marked the area with pen so you can see how far out it is from the post. I hope this tip helps y'all someday. Bob