Hi Andrew, is that your Typhoon? I haven't got paint on mine yet. I had problems with my front planes too. If I got one to work the other would jam. This is caused by measurement from the plan being ever so slightly off. I solved it by using different attachment points for the left and right planes (ditch the Engle tiller arms and get plastic ones with a few different holes) . This means that the planes don't work exactly in sync but hardly noticable. Are you using the rubber band/o-ring periscope? The main problem is the the rearmost non driven spindle. It is only supported by that brass bushing on the lid which is a long way off from the line of tension at the pulley attachement. This causes the rear spindle to bow towards the front spindle and jam in the brass bushing. To solve this build a support plate that joins the 2 spindles and keeps them a fixed distance apart, just below the pulley. I am posting some pics here
http://www.rcgroups.com/forums/forumdisplay.php?f=60 as I don't need to host my pictures. I'll get to the periscope system at some point!