Question about bump mod

[Worlddrum13]

Hey all, just a quick question regarding installation of the miracle bump mod on my 1977 mark1 73. My model has the felts on the hammers rather than the pedestals. My plan is to relocate the felts to the pedestals.

Should I position the bump and glue it in place while the felts are on the hammers? Or should I remove the felts, position the bump, then glue the bump and felts? Or does it even matter?

My first thought is that I should leave the hammer felts while I set the bump mod. If there are no felts at all while positioning the bump, something may change after the felt is reinstalled. Is that a correct thought?

Thanks
Joel

[rhodesjuzz]

I have the bump mod with the felts left on the hammers with no problems at all but I think most of the techs prefer to relocate them.

[David Aubke]

I recalled a discussion where this came up. Found it, but there's nothing really there on this issue.
http://ep-forum.com/smf/index.php?topic=4666.msg37975#msg37975
Good discussion on the subject anyway.

I glue the bump down with a tiny drop of superglue, then glue the felt down over it using contact cement.

[pianotuner steveo]

I seem to remember removing the white hammer cam felts first, finding the correct spot, then gluing and putting the new felt last. Finding the exact spot is critical. It may help to draw a line across the keys with a straight edge once you find the sweet spot. This may save time in the long run and they should come out more uniform this way.

[Worlddrum13]

Thanks for all the input. Yesterday morning I glued all the bumps in place. I set the lowest note and the highest note then used a strait edge to mark the rest. Mine actually turned out so the bumps are just about at the edge of the pedestal with very little variance across the piano. I left the felts on while I set the bump in place

After having all of the hammers off, the felts were actually in good shape. They were all even and showed little wear. I ended up leaving the felts on the hammers. I do have the felt that came with the mod kit, so I may end up switching it over down the road but for now it works great.

The action is very light and fast. It's actually a little too light for my taste, but I'll get used to it. I like it fast and light over heavy and sluggish..

Im in the process of readjusting everything from the escapement, strike line, etc.

Thanks again