Wheels
What kind of wheels are you fitting? Plastic dolly wheels or the larger pneumatic type?
I recently fitted plastic wheels to my Zodiac. I did drill into the transom near the bottom, but I would advise leaving at least an inch between the lowest hole and the bottom.
Following advice I sealed everything with silicone sealant, plus on the mounting plates for the wheels (where the bolts go through) there was space for a small 0-ring, so I fitted those too.
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