I own, use, and really like my Veritas Plow Plane. The only thing that has ever been a bother is the depth stop. I understood this was a known problem before I bought the plane, yet I still bought it. The accepted solution to the problem has been to use a pliers to tighten this knob and those holding the fence steady.
I know there's someone out there who came up with a small fitted strap wrench to tighten the knobs without marring the brass like pliers can, (forgive me if I can't remember the name, I only caught a photo a while back, If someone comments or emails me the info I will add it here as an edit) Personally I think if the strap wrench proves popular it will lead to an increase in problems like this. Without the threat of mangling, those inclined to torque hard will end up twisting off their knobs all the time. (insert adolescent snickering)
The issue is, no matter how well I torqued the depth stop knob it would inevitably slip. A few weeks ago, my efforts led to the failure of the brass alloy and sorrow in the shop.
I emailed Lee Valley right away. Their customer service is awesome! Even on a Saturday I had an answer back in a little over an hour and a couple replacement parts, including a new depth foot to "experiment" with, on the way. The rep suggested I rough up the post of the depth stop foot with sandpaper to try and give it a better grip but he admitted it's not a great solution but Lee Valley is aware of the problem and working on it.
My issue it the depth stop feels like an afterthought, something slapped on the side, which is out of character with the rest of my Lee Valley experiences. I think one (or all) of three things could improve the design.
1. The post is round and on the small side, something with more beef and shape would seem easier to grip, especially if the post were triangle shaped or square, Give me some surface space to tighten into because a cylinder requires a specific tight tolerance to grab.
2. The teardrop shaped clip that holds the post is a hollowed out casting and only contacts the post at two narrow points, If they were to make this a solid strong piece with contact along the whole face you would increase your odds of a good grip, even if you stayed with the cylinder post.
3. Lastly if everything is to stay as it is, then make the knob out of something more resistant to the torque of a pliers or strap wrench, steel would be nice, something in a grade 8 bolt variety please.
This afternoon I decided to try roughing up my post as suggested. I attacked it fairly aggressively with some heavy grit emery fabric in a circumferential fashion. I also roughed up the contact surfaces on the plane body and the teardrop clip.
Even tightened down with pliers, I can move the depth stop by pushing against it with my thumb. Substitution attempt failure.
My solution was to brandish a fairly new tool to the shop. A Starrett 237 Depth Gauge I picked up last month because a little voice in my head told me I'd need one, though I wasn't sure why. I skipped the depth stop and ran the plow plane until my eyes told me I was close to my target depth of 3/8", then I checked with the depth stop and refined from there.
Not completely as convenient as a well designed depth stop would be, but a passable, and (more importantly) reliable solution.
Ratione et Passionis