Mr X - if you don't want to lay out for another shorter gun - have you considered just shortening the barrel and bands? can't believe it would be difficult - just a few hacksaw cuts away...
Interesting idea. I believe you can
shorten an RA barrel with a hacksaw & moving the plugs; you can also buy other barrels -- so I suppose I might be able to get, say, an 80cm carbon barrel or 70cm aluminium barrel. To do it properly, you'd probably want a new spear & need to re-rig the spearline. On the RA, the spear line is clipped on, so maybe the thing to do would be to keep matched sets of
barrel & rigged spear.
However, I like the 90cm gun, especially in Cornwall (would prob. be good for Guernsey & hopefully Devon) & it works ok in Dorset too. However, finding majority of recent shots have been close & swinging into position quickly is critical. The mullet yesterday was fast moving but quite a long shot. I missed a bigger mullet earlier &, while I reloaded, it swam past the end of my gun (perhaps checking out the muppet lure I had clipped on for the day) and then past the side of my mask!
Having a second gun, also means you have a spare and, if same/similar brand, a complete set of spares available when on holiday for example. Don't think I would take 2 in the water together though -- although I know that's Spaghetti's modus operandi.
The other tricky thing about Dorset, like yesterday, within a single dive, vis. went from awful (70cm or less barrel conditions) to probably 30 foot or more where even a 110cm gun could have been used without much bother (or much benefit); 75/80cm might have been a good compromise. Before entering the water, I would have expected worse conditions &, had I a choice, would have probably opted for a 70/75cm gun -- too small by perhaps the same margin as the 90cm was too big. Perhaps Spaghetti has a point.
Although I don't want to carry any more gear (bruised & cut my shoulders quite badly last weekend yomping gear back).
Teak gun like Portinfers - sounds good to me!