Though I would agree with you that the design was not the best, remember these are not running close to the tip speed of even the smallest new mowers. There are many of these that actually still operate, and I am not using it as my primary mower, just want to see what the cut generally looked like. I have a set of JD blades that are the same width as the spindle and tip carrier, and would fit perfectly. I may try that to see if it works. Thanks for all the input, and as always will be safe. Thanks all.