Keeping it simple as ever, I fix the booms with fasteners. Message on the forum as to which, and I've gone here for rusty old decking-screws that were kicking around the garage like a bad smell (Ed. smells don't kick around). They're available from any of your local garden centres, tho' always remember to ask for 'aviation grade' decking-screws.
In order not to split the struts I've gone deep with a pilot-hole and backed that up with a squirt of WD-40 (and where's my sponsorship, grease-balls?). The advantage of decking-screws is they've a reduced shank at that top end: which makes timber less likely to split too.
