Dave Ett wrote:
Yes it does, and it's generally a better port design too.

There's virtually nothing in it, and you won't notice the difference with one of each type of barrel, especially if they are standard.

Dave Ett wrote:
The SP head / barrels are also different to the standard (R+SE) barrel / head.

That's incorrect Dave; the SE & SP are the same, and differ from the R.
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Andy.
NSR-WORLD.COM

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