Drill Press Chuck Repair

I've been thinking about starting on another 3d printer, I have some spare time and I gave the one I started last year away. I have some angle iron and a bunch of 608ZZ bearings, so what's stopping me?
The chuck on my drill press broke. At first it just wouldn't tighten up, then it fell apart (some time ago, I hadn't gotten around to replacing it yet).

Note: Picture taken after I started on the repair.

From what I can tell the ring shaped piece is supposed to be one piece and the outer piece is held to it by a tight fit. I tried heating the outer piece and shrinking it onto the broken ring without success, undoubtedly it's worn and there is just too much force from the chuck key. At this point I priced a new (cheap) one at $25. Not bad, but I have one more last ditch effort before I buy it.

Plan B

I took an angle grinder and ground a hole on each side through the outer piece aligned where the ring sets (with it disassembled). I aligned my hole with the crack in the ring and touched it with the grinder to clean for welding.

Prepped

I heated it with a propane torch prior to welding, I've found this helpful when welding heavy steel with a small MIG.

Welded

Ground Smooth(ish)

It seems to work, tightens and loosens freely, doesn't slip when reefing on it with the key either. It's a quick, cheap fix, so if it fails I haven't lost anything and I'll have to buy a new one.
Now I have to find my drill bits and make some slides.

Y-Axis

The Y axis is the same basic design as the X axis.

Initially I built the Y axis rails too short. My father has told me to measure twice and cut once, Applying that would have saved me considerable time and materials. The upside is I have more travel on the Y axis than I expected, about 14".

I have just clamped the two frames together for now, I want the table on so I can level it before drilling the holes to attach the Y-axis.

I completed the z axis too, same basic design. I'm getting ready to move, so the last time my brother visited I gave him the semi-completed frame in hope that he may have more time to work on it than me. It just needs a table, motors and lead screws to be working. Whether he has time to work on it or not remains to be seen, but I know I won't have any time for at least a few months. I still want a 3d printer, I kept all my electronics, when I have time I'll build another one.

Foot Powered Edger

Well, I'm moving in less than a month! One of the things I have here is a underground fence for my dog. I love it, no unsightly fences, and she's good about staying in it. I dug the wire in by hand with a shovel 4 or 5 years ago. It took me way too long. So I was looking and the easy way is to get a lawn edger. So I've been looking at them, but I can't really justify buying a dedicated one just to bury my fence, so I was looking at weed whacker attachments, but people seem to have trouble using them normally (blown motors and broken shafts), so I doubt they would stand up to the abuse I intend to administer. I could probably rent a heavy duty one, and I will if it comes down to it. but I was looking and found this:
Amazon Link

People seem to like it except the blade bends easily if you hit a rock or large root with it. I think I can make a blade that will stand up to some serious abuse. Here's what I came up with:

I used some 3/16" x 3" stock I had lying around. I did 2x 3"x3" foot pads because I had 6" left over from the 12" blade. the pole is a 5' piece of 1/2" steel conduit. It seems to work pretty good in soft soil (yard), hard packed soil not so well (edge of driveway). It won't go through rocks, but I didn't expect it to. I doesn't bend. that's for sure. I don't know if it will work or not, if it does I think it will be quicker than the shovel, but harder and less fun than the edger. But that would cost a lot more than this. For a one time deal I think I'll manage.