Hi everyone, so as i was rummaging through the garage i found a nice piece of copper laying around. Its 63mm long by 44mm wide and it is 5mm thick so here i am staring at this and i suddenly remember that i have a new 400L/hr pond pump that i never used. So adding two and two i thought that that piece of copper would probably make a nice waterblock. The thing is, using the swiftech apogee gtz as reference, my piece of copper is 6mm shorter on one side and 13mm longer on the other (the apogee being 50mm x 50mm). I played around in corel and came up with these ideas: i was thinking of doing a sandwich kind of effect in three layers. 1.The channel is going to be milled 2mm deep into the copper block. 2. A 10mm sheet of acrylic cut all the way through using the same design as the base plate. 3. A 5mm piece of acrylic with just the barb holes sticking through. Acrylic layers fixed with acrylic glue, then this is attached to the base with silicon glue and screwed together with 6x4mm screws. so the big questions are, will the size of the base plate be ok? And will this kind of design work? I have a friend who can cnc this out of the copper and the acrylic. I was planning to tell him to leave out the final polishing pass so that all the little grooves in the bottom of the copper plate are still rough therefore creating some turbulence (i hope). One problem i see is that the acrylic may snap on such a thin area (for the separation). but other than that, am i wrong about this whole design? comments good and bad welcome as long as they are constructive Thanks in advance!