Installing a day hatch on Prijon

Ddoes anyone have pointers on installing a replacement dayhatch on a prijon kayak?

Replacing a Prijon hatch
You’ll find their people VERY pleasant to deal with, so I’d start by giving them a call or an e-mail.

The person I worked w/here in the midwest was Frederick Hartray. If you need further info beyond that, I know that the repair people at Rutabaga have lots of experience w/their boats.