if it's not a kit car what is it then?
As an ex caterham owner I know what you mean. Many kit car require fabrication skills, this kind of thing doesn't as everything fits as it should. I've heard people describe the high quality kits as component cars.

Car looks lovely by the way

I like to use my pentacon 135, have a various others but tend to use a k-mount equivalent instead.

I often sell lenses on ebay and would not think that lens acceptable, unless described as dusty. Send it back, you should get the price and the outbound postage back within the ebay terms, the return postage you must pay.

I like my pentax M 50 1.4 and Pentacon 135 2.8 (the older version)

I fell into a peat bog in the lake district with my k-x and a M 50mm 1.4. Peat and water got into the battery compartment and what looks like a tiny piece of moss got in behind the front element of the lens. Wiped it down a bit and it all seems fine. Bit of moss still in the lens, but I don't think it affects the lens - theoretical increase in flare I expect.

Does anyone have a lens correction profile for the Tamron 17-50 2.8 Asperical LD XR DiII SP (what a long name) that I can use in Pentax Dig Cam Util 4, ufraw or any other free raw processing package?
I love the lens, but could do with a way of removing the slight distortions that are inevitable with this type of lens.
Rob

GIMP is another option that I and many others I know use. I can't compare it to modern versions of photoshop, but I find it to be free and excellent.
For RAW processing I use the Pentax Digital Camera Utility 4, which came with my camera, or UFRAW which integrates with GIMP

I've had this problem with my k-x, maybe partly because of the pentamirror being a little bit darker than the pentaprisms I was used to on previous cameras.
I experimented with a split image screen, not so good with slower lenses and a bit of a nusiance for macro work, but otherwise good.
I'm now back to the standard screen where I use the green hexagon in-focus indicator and find it very good.
After a recent thread on here I've been experimenting with catch in focus and finding is very useful in most situations - its a bit like an autofocus lens with your hand on the the focus ring as the motor.
Another useful bit of advice is to make sure you eye is right up to the finder (and of course the dioptre adjustment is right for you).

Av about 60% rest in manual

Remember that the buyer is fairly well protected on ebay - you risk a bit of time wasted and return postage (can be quite high).