Mast tube installation:
The mast tube depends on the rig you intend to use. The RT65/RT65R kit comes without rig and sails, you can build a rig according to the sketches included with the plans or use an existing RG65 rig for the boat.
The mast position the mast rake of 5° according to the plan is important.
Take the mast tube of your choice and fix it direct in front of the keel box aligned with 5° rake and 90° to beam according to the plans, exactly in line with the keel with the help of a 5° balsa wedge and some cyano glue. Now laminate the mast tube to the keel box with 2 layers of two inch wide 100g/sqm glass tape and epoxy resin.
Double check alignment and allow the resin to cure.
Mast tube laminated to the keel box