I sent an outboard via parcels.net or some such. there are people who "bulk buy" a contract from Parcel Force and sell it on. The o/b cost about £10, although it was only a 6 hp...
Thanks for the suggestions guys, but as Alan suggests, it looks as if the pressurised CO2 cylinder might be problematical. If the delivery costs are going to be high, I might need to reconsider where to have the service done. I don't fancy driving there myself! Nothing against Essex, but the time & travel costs could well outweigh any savings. /forums/images/graemlins/frown.gif