Option 3:

Over drill holes maybe 3/4 inch diam. When drilling do not not go
through the bottom layer of glass. In other words, drill down into and
through the glass layers of the roof....then the balsa core... then
stop.

take a 1/4 or 5/16 inch machine screw/bolt and put head first into the
hole.

pour in epoxy and "pot" the bolt with threads up. When epoxy hardens
now you have a stud sticking up out of your house roof.

Slide your had rail on the studs. Apply goo 4200 or Sikaflex 291etc and
torque down nut... But do not forget the 1/8 inch spacer between the
rail and the roof. I use nickles. cheeper than washers and can use as
money when finished with project. Let goo cure. Torque down.... then
plug.

Ta da........

Other options??

Option 4:
Tear off and throw away. Hand rails are for wimps.