I disagree that a spinner for your first build should be out of the question.. I'm a carpenter and my team mate is a mechanic, we had never built anything like this before and jumped straight into a heavy weight spinner that worked a treat in battle.. aslong as it's done safely when testing etc there shouldn't be a problem.. sometimes it just comes down to the person and if they're competent or not. As for the price £500 seems alot for just part of a frame?.. my heavyweight cost about 1500 or so all in. All this said I'm no expert so take the advise from whoever you feel confident with..