I designed a simple mast lifter here
http://www.inspiration19.com/mods/mast-raising/
This solution is very solid and does not to put undue stress on any fittings. I made it from bits I had.
I bought a hollow mast from Noble masts in Bristol. I bought this and designed the mast lifter after slipping putting up the mast the "traditional way". Fortunately I was not hurt nor the boat damaged but it was a "call to action"!
Regards
Simon