Top positive review
4 people found this helpful
the smallest so far
on September 5, 2013
I intended to modify the cap, but its glue wilted from Dremel heat, so I discarded it. New cap is polyethylene tubing, from H. Depot (icemaker tubing), 0.250 o.d., 0.170 i.d. Since the inner shoulder on the pen is 0.220, I used a straight-body round file on the cap i.d. to enlarge it just a bit. Cap is very snug now yet fits on all the way. The length overall with new cap is 2.56 (see photo). Body diameter is 0.275. The weight is 8 g.
I didn't like the paint job so I took it off with sandpaper, finishing with P2500 to show the stainless body.
The incarnation I received, also shown in product picture, is a changed design from what can be seen at other sites. It is better. The other ('old'?) design has four telescoping sections total, and the smallest is at the bottom end. I think there is more stress at the bottom than at the top, so three sections with big section down is an improvement in my opinion.
Regarding the telescoping sections: when extended, the two upper sections have 1.2 inch exposed length each. Not strong enough to hammer with, but probably plenty strong for normal use. No sag. No wobble in use. Overall extended length is 4.797.
On refills. The overall length of the original refill is 2.075. Hacking a full length refill below the ink line seems disagreeable, but in my experience it's not so bad. Traditional ballpoint ink has high surface tension, which helps confine it. Voiding the cut area with a toothpick is advisable. Rubber gloves are optional.
Following are quick and subjective judgments of some refills. Score higher equals better, on: line darkness, smoothness, tendency to skip, tendency to blob:
OEM M: 2;3;1;2
Papermate G-Force 1.0: 3;3;3;1 (requires custom fitting at tube shoulder)
Pilot Dr. Grip M: 3;3;3;1 (requires custom fitting at tube shoulder)
Penatia Size-it M: 3;3;3;1
Cross M: 2;3;3;2 (cut with jeweler's file)
BIC Easy-Glide 1.0: N/A (dimensionally incompatible)
PM Trim2Fit M: 2;2;3;2 (excellent fit in TU nozzle)
Pentel RSVP M: 3;2;3;1 (excellent fit in TU nozzle)
Due to its small ink capacity, the TU is not suited for a workhorse role, but as a spare pocket pen it can be recommended. Lately I have developed a thing about mini pens, but I haven't seen a practical writer smaller than this.