I lost a mast last Labor Day. In rerigging boat 831, I have all parts to length per the factor specs and the rig is beyond loose to sloppy. Checking old parts, I find that an old forestay was shortened and used with full length shrouds. The rake would be over 29'5". The used mast I found has an 18' forestay but the shrouds were shortened. Mast height checks out. I am now working backward starting with the rack at 28'4" and making the necessary shroud length adjustments. Anyone have any thoughts on anything I am missing?