I see 5 "custom" creations, but only 1 custom set. The rest are customized
minifigs. Yes, they are custom, but not in the way your hopper is custom.
They are modified Lego. Your hopper is an alternative to TLC designs. The
other 4 "creations" are similar to that, but not sets, as they do not
include instructions.
I would highly suggest you start a numbering convention. Your hopper could
be LP4501. If I came up with some designs and sold them, I could have
MP45xx-MP45xx (45xx because they are for 9V train).
This isn't me... space sucks :-). (URL) check this out: I don't THINK this is Craigo, but maybe?? (URL) on "custom lego" gives 29 hits... one at least is a mishit but still: (URL) (25 years ago, 9-Feb-00, to lugnet.market.auction)