Ok here goes, a step by step egg tumbler smaller version to fit tanks as small as 10gal.
If something is still confusing or I left something out, just ask and I'll try to clarify.
pic1 stuff you need
1/2" pvc, 1/2"pvc cap & T, 1-1/4 pvc cap(2ea), standard florecent plastic light tube(clear), air regulator(optional),foam of choice for intake and head cap, hard plastic air line, suction cup,
1wood/metal screw(stainless),screen netting(soft-fabric)and tools. Most tools are self explanitory, drill bits you determine(not critical),spade bit 7/8" or 22mm.
pic2
drill both 1-1/4 caps(center best you can) with spade bit
pic3
glue short pieces of 1/2 pvc to 1/2 cap and T (1/2 pvc will determine overall length of assy.)
pic4
glue 1/2 pvs assy's to 1-1/4 pvc caps
pic5
drill top head assy, add screw, this will secure top head assy to clear body(florecent tube cut)
pic6
drill numerous holes for water intake
pic7
place screen over bottom assy, slide clear tube over, trim excess
pic8
trickiest part of the whole thing is to cut the famous patented leviathan25's "L" in the
top of tube for securing with screw.......well maybe not famous 8)
pic9
test fit assy, make any adjustments necessary
pic10 & 11
make a small sponge filter to insert in the head assy, this will prevent the accidental
sucking up the eggs and out into the aquarium if you use too much pressure.
pic12
make pre-filter, otherwise food and waste will contaminate your eggs
pic13
drill hole in head assy, install suction cup(I use a left over heater suction cup but
any will do, drill hole slightly smaller than cup's button)
pic14
drill hole in top center for har air line, pvc glue to assy
pic15
assemble and ....TA DAA
pic 16
new egg tumble compared to larger assy.