The International 420 has been recently redesigned by Andrew Lecthe with:

CM 21 Mainsail – with easy to trim with power in the head for better drive and pointing

CJ 21 Jib – This has a matter better groove to steer with a reduced angle of attack. This jib really helps with your height when trimmed firmly

CS 21 Spinnaker – This is a .6oz Spinnaker which is easy to trim and has good power for the downwind legs.

DOYLE SAILS 420 TUNING GUIDE