Once the screws are out, the drum is free to come off...it would be a good idea to use anti seize compound when putting them back together to avoid the 'stick' you have now...very common.
On mine the heads twisted right out when we tried them with a screwdriver...like playing in butter near...I had to drill them out...if anyone needs to know...you can drill them with a 1/4 inch drill all the way through the canter of the screw without touching the threads...then use a 3/8ths bit and when you get to the end of the tapered head of the screw, it will twist off...then you can take the drum off and I had no problem locking a vise grip onto the threaded part of the shaft from behind and turning out the stub.
Hopefully the impact driver will do you...for most people it does!!
brute4c
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!