[Rhodes22-list] Installing a hatch

[The Rhodes 22 Email List]

Has anyone installed a hatch on the Rhodes 22? I would like to add one to my
boat but the cabin top has a curve and I am wondering how others dealt with
that. Was the hatch able to take the curve or did you need to build up a
collar for it. 

Alternatively, Can someone tell me the setup for boats that had the hatch
installed at the factory?
Thanks,

Graham