Tom

Firstly - Thank You for a superb and detailed reply, much appreciated!

So, you've added some science to what I kind of figured. For me, weight, performance, sound are the important ones as are aesthetics and I opted for the X Racing single pipe, as it's light ally and the baffle makes it tuneable if I so wish regards to noise only. Clearly this is the perforated tube and the link pipe is really quite straight and as such fast flowing with less back pressure. So with this is mind I need more fuel and air, so fitted Kev's fuel mod and the K&N air filter. I have the ARD cases rack +/- panniers depending on what I'm doing, so to 'balance' the rear end aesthetics (I have the R&G taoil tidy there too) is not on my list at all.. I appreciate however other folk may feel differently.

My Ten' is as crisp as it can be (in my opinion and without altering the engine internals) and certainly is a zillion times better than the standard set up. No jittering, lag and quick on and off the throttle response. Not quite like my WR 45O with FMF, but not bad.

There will always be the need for choice, as consumers are fickle and if there's a good single can option from the same twin can supplier, then I think that manufacturer covers all possibilities and maximises their sales potential. Makes good business sense to me and I hope that choice is available soon, as it will probably be much easier than all the bank transfers etc I had to do for my X Racing pipe - worth it though!

Cheers..