The floats are constructed in two halves split along the keel and deck centreline. 6mm Gaboon ply is used for the floats with 5 panels each side glassed inside with unidirectional and outside with biaxial. Each float has a fin case built in to accommodate a pivoting asymmetrical fin. This works well on the smaller 670 with loaded shock cord for the downhaul and a line led to the cockpit for the uphaul, very convenient for sailing in shallow water. A standard dagger board in the main hull can be built if preferred but the space taken up by the case can be a problem.
Beams are essentially a top hat section built in unidirectional and double bias fibreglass.
A simple plywood mould is constructed and the four beams are moulded from this. If desired a non structural fairing may be laminated to the forward side of the beams using foam and lightweight fibreglass covering. The folding system uses 6061 grade T6 temper aluminium for the arms and 316 grade stainless steel for the pivots. The arms and pivots are best made by a specialist alloy fabricator. The rig consists of an 11 metre mast with diamond stays, supported by lower shrouds to the cabin top and uppers to the floats, the upper shrouds also act as backstays.