Join Date: Aug 2013
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Re: mast bend problem
Firstly, your rigg seems to be inverted. Not good for sailing. Fix it before you do anything else.
Secondly, what could be the origin of this and how to fix it? It is of course difficult to say without an inspection, much will be speculation.
Seems to be a traditional masthead, with forestay, backstay, right angled spreaders and forward and aft lowers. Mast top is however now pointing forward, but was OK before mast was unstepped. (?).
First guess would be that the lowers are not of the same length, and that the aft ones now are forward and the forward ones are aft (the forward ones is then slightly shorter than the aft ones). This forces the mast to bend somewhat back at the spreaders, leaving the mast top to go forward (due to the weight of the furler).
A small variation of this guess is that the aft lowers are too tight.
These guesses doesn't fully explain your issues with the backstay, but a bent mast is shorter than an unbent which could explain that part.
Not really sure how the backstay arrangement looks like. It is quite important that adequate tension can be applied, at a masthead this is more or less the only trimming point.