What size shaft do you use for your mini and what is their height/length? My gelding is 38- 39-ish inches (measurements depend on how still he stands- lol) long and I have ordered 51" shafts on a new cart. I currently have a training cart and have had him stand in the shafts but not actually hitched as he is still in green and just not ready yet, so it is hard to get an idea of an ideal length at this point. As I understand it, is it add 10-12 inches to their body length to work out shaft length? It is a loooooong way to freight a cart so I thought it was worth triple checking with you lovely LB'ers.. I have no plans on getting another horse at this time, but *if* I ever did, I would probably get a similar or marginally bigger sized horse (my boy is 34.5 inches tall).