i see your problem .

Your traveller is out ! , I would too have same prob if I had traveller out , it is like water and electrical flow , energy will work on easiest option , so your energy pulls the traveller up (i assume you have an efficient ball bearing harken or similar ) rather than sheet in when you get to a certain stage . pull traveller up into centre , where it should be going up wind, use your downhaul first to depower before travellin out , you will be able to pull main in as hard as you like with traveller centered . if you need to travel out a bit do it after you get the sheet in ,

didn't think a big lad like you would be having probs with a pull .

you could also fill the traveller with treacle and sand which would tend to stop it moving ! before sheet comes in <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />