Upload & Sell: Off
I just did my 85/1.7 top to bottom since the blades would not go past f4 and were getting worse, and focusing was an effort. It wasn't too hard to do the blades, getting the blades back together wasn't too hard.
There was a disk with holes at the bottom, the blades have a stud that goes in the hole, stack the blades moving to the next hole, the last 2 are the hardest to seat since they go under the first ones, just hold them down so they don't pop out, space out the upper studs, that will make it easier to set the cup with holes into position with the studs in the holes, invert the sandwich onto a tube(or your hand), then lower the lens slowly over the sandwich till it bottoms out, keep pressure on it till you flip the lens and set it down, then it's just a matter of reversing the disassembly.
My lens works like new so, I'm a happy camper now.