I own a 25 ft Helms 1975. I would check around the foredeck for soft spots seems like 3 or 4 other Helmsies have had problems with softness. I drilled out over 200 spots on my hull to eliminate the core wetting issue at every fastner and found water intrusion to the degree of discoloring the wood only under the primary winches.
You may notice the cockpit has scuppers aft on the pop top model and forward (not better IMHO) on the non camper.
I've been pleased with mine and will answer any further questions you have if you buy.
Helms's 25 "CHIMERA"