If you build a temporary inner skin make sure it is sufficiently thick or properly braced so it doesn't bow or deform while the compound is curing.
My first pourable transom was made using SeaCast on a 16' PowerCat bass boat. It ended up being over 3" thick in the middle. When the SeaCast was curing a lot of heat was generated and my temporary inner fiberglass skin got soft and deformed. I found out I had a really, really thick transom when drilling it for the motor mount holes.
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1973 Mako 20' Center Console
1984 Wellcraft V20 Cuddy
1977 Wellcraft V20 Center Console
1975 Wellcraft V17 Center Console
1964 16' Super Skeeter with 55Lb thrust Motorguide Trolling Motor
1985 Glastron HPV-175 - sold
1984 Wellcraft 180 Fisherman - sold
1973 Mako 17' Angler - sold
1972 Mako 17' Standard - sold
1972 Mako 19' Center Console - sold
Always looking for the next one.
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