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The advice given on this site is based upon individual or quoted experience, yours may differ.
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IMHO... That looks marginal for a C-25 to me. The axles are the minimum and the channel material is small. I am sure it handled an Evelyn but was probably at it's safety point. No drop axles. The mid and aft supports look like they need to be shortened and re-angled. A couple hundred dollars at the welder and it should be a good yard trailer at a club with a hoist. (I would not describe it as a sail on trailer.)
Trailer looks pretty good to me, but I have not trailer-sailed mine. Rear pad supports side to side measurement is the same as on the cradle drawing in the owner's manual. Why do you say it might need to be angled inward?
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.