I have not worked with that specific speed controller but it appears the HF speed controller is similar to one I own from MLCS. Speed controllers are designed specifically for universal brush-type motors as used in routers. They work well with basic (non-electronic controlled) routers.
Routers with electronic circuitry for slow-start, variable speed or electronic braking may have issues with them however. Some people who are handy with electronics and electrical devices have gone in and bypassed the electronics in the router to use the speed controls but that is obviously done at your own risk, both for your safety and the risk of damage to the router.
Since your Craftsman does not have speed control and is unlikely to have electronic braking, I would focus on whether or not it has a soft-start. If it doesn't have a soft-start you will feel a very noticable torque in the router (trying to rotate) when you turn it on. Soft-start is added to some routers to accelerate the router speed slowly (speeding up over a second or two) rather than turning on like a light switch.
I hope this helps.
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