There's a lot of Lego out there, isn't there?!
If it helps, the bricks on the left are the ones I used, stuck together as demonstrated in the middle:
- Lego bits.jpg (253.05 KiB) Viewed 4362 times
I knew what I wanted, from looking at my son's collection, but even so they took a bit of finding, and I had expert assistance! To use the proper Lego terminology, the bricks I used are a "LEGO Dark Stone Gray Plate 1 x 2 with 1 Stud (with Groove and Bottom Stud Holder) (15573)" and a "LEGO Dark Stone Gray Technic Brick 1 x 1 with Hole (6541)".
There's a 2 x 1 version of the brick with the hole too, which could be handy for freelance axleboxes. Or bogies?? If it were hidden away you could possibly make a whole Lego sub-frame, which would certainly make it easy to get things nice and square, never normally a forte of mine!
The piece on the right is a "LEGO TECHNIC Pin Connector Plate 1x2x1.67 Grey (32530)" - I bought 20 but didn't use them in the end. I still think they could be useful sometime - inside bearing mine tubs maybe??
The pair of wagons I'm working on at the moment are coming on nicely - pictures of progress tomorrow, I hope...
Cheers,
Andrew.