I run a jy15 main withought a boom on light days.
A flying junior sail on heavy days or with kids.
I just purchased a squaretop for a 420
And it fits just fine.
The only thing with using sails cut for other boats is the tack mount. But a little bit of line and thought and...
We got this crazy idea to over canvas saterday.
We had some bran new jy15 sails from intesity sails. Luff 18.4 and foot 8.3
And the jib want all the way up the forestay. We ran boomless and rigged a 2:1 right of the traveler to the clew .
Wind was reported as 5.7 with 7 gust.
Mission bay CA.
Took out my brother and his family.
I was using my bright red flying junior main. You'll notice when the mast comes out of the water how much smaller it is, she is slower but the reduced sail area makes for relaxed fun.
We capsized on purpose to show my brother the ease of righting .
Was a good...
Honestly one of the main things to check is the integrity of the fiberglass. Forcefully push down hard on every section of the hull and look for soft spots cracks etc. and then the aluminum, I.e. Mast ,boom, tiller gungions.
Inspect the center board as best you can like caprintx says ,make shur...