Calico -
I know you have the Block of Fiberglass - but looking at the model - I wouldn't mill that from a solid block. I guess the 3 pegs maybe support something? Or are used to position the rectangular cup for attachment? Either way there won't be much strength in the piece once machined to the shape of the model.
If fiberglass is the preferred material for the product - I would make a mold and lay up the fiberglass. That way the pegs and cup could be reinforced and the fiberglass weave/pattern/grain could be better aligned with the forces you'd anticipate.
If the product is ornamental (no strength required) - again I would make a mold and just cast it in resin/plastic.
Best of Luck!
:cheers: Jim
Experience is the BEST Teacher. Is that why it usually arrives in a shower of sparks, flash of light, loud bang, a cloud of smoke, AND -- a BILL to pay? You usually get it -- just after you need it.