Very cool. That makes total sense. I'm going to give that a try. Thank you very much for the info.
If your up/down works similar to the way mine does on my Tandem island, if I understand Matt correctly, then it should be pretty straight forward to add a pulley inside the hull to increase the leverage to the up pull cord. Basically look for a fairly clear area that the control line runs through that you can reach thru the hatch openings. Pull the rudder all the way up and mark the position, then let it down and mark the position (the cord in relation to the hull, and the point on the cord that you will cut, making sure the pulley will not catch on anything inside. You then cut the line about 2 inches forward of the front mark (2 inches so you have cord to be able to tie that cord to a small pulley), Now you will need a new piece of cord at least double the length of the remaining cord (that the handle is attached to). You will need to take old piece of cord out of the handle and replace it with the new longer cord. Feed the cord into the hole then snag it and feed it back and around the pulley. The other end of the cord just needs to be tied off to something solid inside the hull (preferably forward of the opening where the handle comes in and off to the side slightly so the 2 lines can't spin and twist easily).
Now when you pull on the handle the cord will come out much further and will be much longer than before, but you will have twice the leverage that you had before. (this is called a 2:1 purchase).
I recommend using a cinch knots if you can when tying spectra cord (you can get the spectra cord from most dealers (spectra is extremely strong with around 600 to 700 lbs break strength). While your there explain what you need (they will understand exactly what you need right away, this is all pretty common stuff, have them show you by pointing and explaining at what you need to do on another hull in their shop, they can help you select the correct pulley and will likely have it in stock, I'm sure many dealers will offer to do the work for you once they understand the problem for a couple bucks if you don't feel comfortable doing it yourself.
Hope this helps