Hi Lee. That is a real neat project idea. I imagine, with your niece and husband being new shop owners, you could have enough content material for quite a long time!
Nice option with the magnets - off to the Lathe I go. I brought a very similar press in Australia 6 months ago and I have been slowly adding some tooling as needed. There are Commercial Pressbrakes in smaller sizes for those without the shop or skills or TIME to make one too, I added a 300mm heavy duty one to mine which is fantastic for up to 3mm plate.
Glad to see you followed my suggestion. Now you need to make the angled storage rack from tubing in the upper left inside corner. Where you are storing them will be in the way of the garage door pulley when you run the cable to that side for lifting the platen.😮
I have a magnet permanently fixed on the end my press ram. My steel tools then need no magnets. I also have a magnetic chuck clamped to the press bed for the same reason. Examples can be seen on my rubber blanking and forming demonstrations.
Thanks for the video. You didn't state what material you are using for making these, from the looks of it I'm guessing you are using 4130 or 4140. I'm still having to make myself a set of these as well and was considering just using 4140 and heat treating the ends then tempering to try to keep distortion from happening as much as possible. I have an older model press with a design I haven't seen before in 30 ton and trying to avoid having to turn the ends if I can keep from distorting them.