Fixing Manual Mill Spindle - No Contact Between The Taper of Tool and Spindle

[GBWM]

Hello. Recently I've had problems with a cheap manual mill I bought for my workshop. I wasn't able to fit MT4 tools - these didn't want go deep enough so the taper fits properly. Check out how I solved the problem. What do you think of this solution? Maybe it will give someone an idea how to deal with such issue.