no cheek block
Cheek blocks are unnecessary. A couple of small blocks, with springs to stand them up, shackled to a padeye, toe rail, lifeline stanchion, or track car if the track goes there, as far back as possible. Rig an adjustable tack line that you can control from the cockpit. Attach it at the stem fitting, add a strap to hold the sail close to the forestay if you want. Halyard should be run through a swivel block shackled to the masthead in front of forestay. Finally, build a set of "twings" or "tweakers" to control the sheet angle. Here's some professonal help: http://www.cruisingdirect.com/RiggingGennaker.htm
