i have done it , no problem
ill do yours if you want
or like you said get a small c clamp
put something soft on the inside glass, put a small socket against that. put the clamp on and put the other end over a u shaped object so when you turn the screw it will pop the glass right out, it will come out, going back is put a dab of sillcone inside the housing, make sure the oring is there. place a dime against the outside of the glass, place a small piece of metal inside and tighten down slowlly and it will pop right back in and seal up.
if you need help let me know. or as i said send them to me and ill do it, and send them back for free.
its not that hard to do if you want to undertake it, if someone is there to help its a little easier so they can help hold the c clamp in place.
you can also use a big socket when popping it out instead of the u bracket. something for the lens to pop out into.
