@Ernie- There is a fair amount of mass, I suppose. It's been a while since I had it unmodded, but the part that rotates is probably about 35 grams- quite centralised, though. It looks like it is concentrated at the edge, but the bottom of the rotating part is quite thick. Holes could be drilled in it to reduce the mass.
The front of the drum could be cut off in the same way as the back, but I want to leave the curve for the thread of the anti-skate weight to run round. When I get round to adding it.
@Blue- Thanks for the kind words. I would love a well-kitted-out workshop, but, as a student, it isn't going to hapen for a while.
Mind you, chaps that build cartridges need a standing ovation.
Tracking issues- depends on whether the month has an 'r', the temp, humidity, the wind speed...
Really, it depends on whether the phono stage has moved in it's 'mount'- the wirea apply quite a bit of force. Generally seems fine, especially since I measured the tracking force ('twas a bit light).
Sound-wise it seems quite sure-footed, and fairly neutral. The Bass seems well-defined, compared to my other references. Sounds a little better than CD to me- higher, smoother highs, more defind bass, less congested.
I haven't really heard many other arms- my reference points have been a B+0 7000 music centre with a knackered cart, about 5 minutes of a Linn Basik Plus w/ Dynavector Karat 23RS on the same deck (when purchased- removed with intention of selling. Didn't try the Basik and the AT110e together as the cart arrived later, and the armboard had been used to fit my DIY arm. Might have to refit it and compare.), and a Pioneer PL-12d (Std. arm, AT-95e and AT-110e).
This arm was one of those things that just seemed to 'happen'. One minute, I was looking for a TP-13A (std on this deck), the next I was mucking about with bits of bamboo and screws trying to make a gimballed arm. Following that, I looked at the Ladegaard arm wand/knife edge design and decided to put it on a VHS head. The bamboo seemed like a good choice folowing discussions on DIY audio.com.
The bearings are very smooth- no detectable play, and the arm moves vertically with just a small peice of paper placed on the 'shell.
P.s.- watch out for a thread on the proposed TT design. I have done the drawings by hand, and have a few ideas- involving more VHS heads, concrete and magnets- floating about. Probably won't be built properly untill next summer, but I might try to do a (very basic) prototype over Christmas.