just wondering;which is better for finish sanding,1/4 sheet or 5'' random orbital sanders.im leaning towards a 1/4 sheet,cause i have a dewalt ros.worked pretty good new,but now it spins too fast to do a good job .it did come with a replacement bushing for dust collection,which when worn lets them spin too fast,and i did replace that.this sander is about 3 years old,but has not been used all that much.i was looking at the bosh 1/4 sheet sander,looks pretty good.anyone else had experience with the ros speeding up and being hard to control? we have a new dewalt at work and it works good now,but thats not saying a year down the road it wont be like mine. just wondering,any input on this matter would be greatly appreciated.. thanks .