Received my modded Eotechs yesterday and must say I'm very pleased with the results, looking as professional as one can expect w/o coming off an assembly line. It adds nothing to weight or bulk and doesn't obstruct FOV as well. With no moving parts it's as KISS as you can get and nothing appears to be located where it would be prone to damage. I added the detachable velcro myself to provide protection for the solar panel when desired and to allow use of std non-rechargeable batteries (currently using a double strip as the cover as the velcro I have on-hand isn't wide enough to cover the width of the panel w/a single strip, I'll pick up something wider in the near future). Is this mod a "must have!" for Eotech AA owners? I think that depends upon your planned use but it suits my needs *very* well. Thumbs up!...