I think the bottom is temper glass.....well the 75 I was looking at today have the sticker on the bottom "DO NOT DRILL"..........But I would like to do a few holes in the back for closed loop<a href=showthread.php?s=&postid=7475169#post7475169 target=_blank>Originally posted</a> by thesaent14
if is not temper glass you can drill and it will be beter because like that you can drill the back for close loop if not get a RR tank
<a href=showthread.php?s=&postid=7475226#post7475226 target=_blank>Originally posted</a> by thesaent14
i probably can help you with that depens on how you want it i tink i can make somting