Word is from reliable sources the Inter 20 internationally is going to adopt the larger main -sail of 215 sq ft total -inc mast .

The I-20 has pretty much dominated the competition in the production 20 category . The only way other 20 ft 8.5 beam production boats will ever compete with it is to adapt a similar light weight carbon fiber or comperable weight alum mast , and add a new sq top 215 sq ft main and comperable jib of equal sail area.
Any 20 platform will compete but really needs the equivalent mast and sail plan to do so..
The F-18 class is evidence of this .

Equal sail area can be added per equal or smaller main with added jib area or equal total , though max size 215 main is the best option.

Heavier boat weights of 30 lbs are allowed a larger spin and jib per proposed F-20 rules ,-
crew weights are often much more varied on these larger more powerfull 20s being designed optimized for 350 to 400 and larger crew weights,-

Many 20 sailors periodically need new sails , so the transfer to a 215 sq top seems within reason ,-
the main expence then is a comperable 32 ft mast .

Other than a new mast the other option is a carbon fiber replacement top section ,--these weight approx. half the weight of a H comptip and could be extended up to a 32 ft mast length . ---Sail lofts making sq tops need to target the 20 mainsails to 215 sq ft inc mast ,--and offer this CF mast option with bending characteristics a known quantity for matching sail -mast prebend and overall sail configuration ,--{ luff radious } per mast bend characteristics per sail maker / loft .
Any type of 20 could be modified in this way along with a spin snuffer system and equal the speed potential of an I-20 .


F -20 production platforms inc
Hobie FOX
Nacra 6/0
P-19
HOBIE 20
Mystere 20 8.5 b
Arc 20 - minus 12.3 in version
Inter 20
Tornado 8.5 b version
Hurricane
and number of EU 20 ft platforms