Can anybody help me with these A Class questions:-

Would Marlow 9mm->6mm "Tapered Dyneema" be OK for an A-Class mainsheet? 6:1 then going up and along the boom and down to the tramp. If not what would you recommend?

It's probably just cos I'm a wimp, but I find the centre sheeting hard to hold in a blow with a 57mm ratchet block; does anybody use a 75mm block, or do I just need to spend more time in the gym... it would look huge I guess...!?

Can I safely travel with the A using a 4 bucket-type trailer or should I have to modify it to support the boat by the beams...? It's a Flyer with bonded beams.