Mine are very similar to the sketch RAC has. The angle and length of the blocks are unique to each camper. I could not use the original set I made for my old TT, the dimensions were all wrong.
The first set I made for my 5er were still a bit to short. I made a mistake similar to bigbud450 and moved the camper with the chocks still engaged. The 1/2" all-thread folded like an "S". It was a PITA to remove. This set of chocks were still a bit too short. If tightened to much, they were a real pain to remove.
Made a new set that is approximately 1" longer and they work perfect. I painted them a bright red to help "remind me" to remove them before I take off.
'04 Wildcat 29BHBP
'02 Chevy 2500HD
DMax/ZF-6 Speed, CCLB, 0-70-110 HP VA Tuner,
5" exhaust, H2 Tires/Chrome Wheels (315x70-17),
B&W GN hitch and 5th Wheel Companion,
BrakeSmart Brake Controller