Nice work
be carefull of the 16;1 down haul, the lug on the halyard won't take it maxed out. you don't need much downhaul on a soft rig anyhow.
likewise, be carefull of the 10;1 mainsheet on that boom. The clew of the sail does not line up with the sheeting point so you will be trying to bend the boom!
Agreed - with 16:1 you will probably be able to break something...
The sheet attachment point on the boom looks stock, however.