This is a followup to my post last week about getting sent a mismatched stem and handlebar from an online shop. While the stem is no good to me and will be returned, the Ritchey Logic anatomical handlebars seem decent for the £10 (about $16 US) they cost on clearance.
While looking through my bike-bits drawer, I realized I had an unused pair of aluminum 31.8 to 25.4 shims. Placing these on the handlebar, they are a tight but almost perfect fit. They are a hair small, literally - if I press them to the bar with finger strength, they will stick in place, gripping the bar, with only a hair's gap visible between the handlebar and the center of the curve of the shim. I suspect that with the added pressure from a stem clamp, they will fit perfectly.
Does this sound like an OK thing to do? I could also try sanding out the inside of the shims a bit, but it almost seems unnecessary...
The bars are aluminum, not that high-end, so I figure the tubing won't be too delicate or thin. The shims are also aluminum.