Metric spline shaft > 1/4 inch shaft pot conversion

[Toney]

My knobs and pot shafts don't correlate...
That is to say, I inadvertently have a selection of both. I usually just go with the flow when selecting knobs for a project limited and based on the parts' compatibilities.
This time I REALLY want to use one of my 1/4 inch shaft knobs on a metric spline-shafted pot.
Of course i travells in a stupid eccentic orbitwhen it's turned, so I have been thinking abot possibble conversion tequniues. The easiest is shrink tubining but it doesntseem that hardy.
Has anyone come up with a better solution?

[Ripthorn]

Is the 1/4 inch knob a spline shaft knob or a smooth one with set screw?

[Dai H.]

I've seen a product, basically a spacer which looked to give an exact fit, but it wasn't inexpensive if memory serves. Maybe you could make something like that from very thin brass sheets or something.

[Toney]

It has a brass insert with a smooth bore and set screw.
Yes, I've just got back from the hardware shop. I couldn't find anything really. I was hoping to get lucky with some copper tubing from the plumbing area.

[Ripthorn]

I would look into JBweld or epoxy and some straw cutoffs to make the spline shaft smooth.  In fact, you might be able to just use the straw...

[davent]

These work pretty well. http://www.guitarelectronics.com/product/CPBSH/Guitar_Bass_Control_Pot_Adapter_Bushings_2.html  Or if you have a source for brass or aluminum tubing the O.D. is 0.25" and the I.D is 0.235".

There was a thread about this a little while ago and i think the person ended up using a straw as a bushing, can't be sure. 

dave

[Toney]

They look perfect...except for the price. They charge  $4.95 for a regular Alpha small pot so I'm thinking those bushes must be available cheaper, if I only knew where. This would be a good one for Small Bear to carry.

I would like to do some kind of home-brew solution if possible. My reasoning? Pure generation "Y" I want it, and I want it now 
If I order something, I might as well just buy another pot.