Graeme, here are photos and dimensions of the Peep Hen tabernacle. This Peep was built in 1984 by Florida Boats Works ,is 14 feet long and originally gaff rigged. The mast from the factory is a converted flag pole of 6063 aluminum and the half pipe and side pieces are 6061-T- 6.
Mine had to be repaired after a tree strike at a very narrow and crowed boat ramp while on the trailer. Purely driver error.
The repair required removing the tabernacle and having a machine shop relief cut, straighten and then reweld the tabernacle. The Peep normally has a straight mast and mine has an aft slant of a few degrees but seems to work well. The lower tabernacle stub sits in a molded fiberglass socket in the Peeps foredeck. The tabernacle seems plenty strong for the 115 square feet of gaff rigged sail the Peep Hen normally carries. The only chronic problem I know of is a gradual enlargement of the pivot pin hole over time. This is usually fixed with either a bushing or an oversized bolt install.
Curtis