Tony, you use the pins as shims between the two pieces, there aren't any holes afterwards. This works well for larger sheets and gives a really nice joint.

Wow that tank looks all shiny like a hot rod :wink:

Can't wait to come see it in action :razz:

Oh cool! So do you pull the pins out one-by-one, or is it better to pull them out simultaneously?

You pull them out one at a time.

Zephrant on RC has a couple of good explanations of the 'pins' method

http://reefcentral.com/forums/showth...postid=1171757

http://reefcentral.com/forums/showth...87#post3824387

Melevsreef is also a great source.

http://www.melevsreef.com/tools.html

I used all 3 links as my guide when I built my sump\fuge. Surprisingly easy and this is coming from a guy who is a complete spaz around power tools :mrgreen:

That thing is fantastico! I hate you!!!!