Disassembling the direct drum should be a straightforward task, but the tool I bought to help only helped me work on my 4-letter word vocabulary. Turns out that a tool made for all purposes sucks at single purposes.
In this video you get to laugh at me failing several times, and then learn how I fixed it and finally got the drum apart.
If you want to do the modifications, the tool is available here. Probably still easier than making a custom tool.
https://amzn.to/3vCyr4i