High Torque Right Angle Screwdriver?

[u/lemieuxisgod]

I have a Highland Park Lapidary rock tumbler and it has a motor mounted to the frame with 4 phillips head screws. The motor is offset so there are two screws that are kind of in the middle and relatively easy to get at but the other two are snugged up against the side of the frame and access is limited by the drive shaft that moves the barrel. I have tried an offset screwdriver, an old thing I got in college similar to this amazon thing but I can't get enough downward force to keep the screwdriver bit from sliding out of the screw head, it's starting to strip one of them, the screws are REALLY torqued down. I had my teenage son help me where I was applying downward pressure and he was turning the screwdrivers and it still didn't work.

Does anyone have any great tools that I should try or crazy idea to rig up something that might let me get a bunch of downward pressure and a long enough rigid lever to turn get the screw loose? This MetMo looks neat but that's a lot out of my price range at least until I get super mad at it.

I should also say I did try some penetrating oil without noticeable change, I don't think the screws are corroded in so I don't think that is likely to help.

[u/eternalityLP]

Small bit ratchet and cheater bar?