It actually looks extremely simple modification. Except you wont have to add that wooden block. You may actually have to cut it off and add a loose buffer oring. The pushpin hole on the bottom seems jsut a tad bit lower than the A5's, so you may have to dril it to clear the holes. The supports on the pushpin tabs may or may not interfere with the A5 body though. That can easily be fixed by cut a bit of it off though.

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SilentDeath12886's Compilation of A-5 Projectshttp://www.a5og.net/5-photo-gallery/...tml#post125307
The E-bolted A-5http://www.a5og.net/5-mods-upgrades/...tml#post108414
The X7 egrip retrofitted A-5 http://www.a5og.net/5-mods-upgrades/...tml#post122941
The old A-5 http://www.a5og.net/showthread.php?t=5009
The 98c backuphttp://www.a5og.net/showthread.php?t=5893