pretty easy to take the drum apart ...
not easy to change headstay ... and no reason to do that.....
so you have a number 5 tuff luff and the harken furler is no 6....
I run into the same crap with a couple of my sails last year when I installed the furler . there seem to be quite a bit of miss information out there, in regards to what is what ... If I remeber right the difference between manufacturer A ( tuff luff) and manufacturer B ( Harken) already took care of "half"the problem... the other half ??? I just hoist whatever I have and dont even ( try ) to think about it... so far so good ...
you gonna enjoy the roller furler, I sure do
