My pump motor is in bad shape. I let a drip persist on a relatively new whisperflo and it rusted pretty bad. The pump portion is in good condition. I was looking at replacement motors and see that it could be a savings. Only thing is I have been told mating the two can be real hard to do. Is it that hard? Would a pool repair guy do it? What about somewhere that rebuilds pumps or electric motors. What would it likely cost? Thanks.