Al-u-min-ium Lockheed caliper cap?

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not seen any alloy plugs alloy plugs in alloy calipers is a recipe for seizure i would stick with stainless
 
Surely an anti-seize exists that would both seal w/o severe galling torque and release w/o distorting the Alu threads. Would be fairly expensive I'd think to do one off via CNC or old fastioned machinist tedium for undetectable mass & heat loss but following Commando path of optimization. Suppose I need to ask what the cap thread for is to pow wow with machinist. Peel's needs a cap and recoiling putting back a lug of even nice SS but likely have too. Could mil out SS cap to approach Alu hm. Half Dozen of these nil little nothings worth ~1/2 hp in right direction for ever more. I'd not use 2 tiny pin holes to attach wrench too, but a bar to put big adj. wrench on. Drilled out lengthwise of course to nullify its mass.
 
I share your sentiment, Steve, but it's sort of like "trying to make a silk purse out of sow's ear." As you know, the caliper is 2nd gen. While it does have two live pistons, it's pads are too large in diameter such that the travel speed of the disk past the pad's inside edge is much slower than it is at the pad's outside edge. That speed differential translates into excess heat differential between the disk at the inside edge and at the outside edge. That's why some discs - under heavy sustained braking - crack, especially after they've been drilled. That's why the 3rd gen calipers/pads are smaller in diameter and, to retain surface area, offer two or even three pads in series.

It's a good caliper, handsome too, not much weight to be saved at the caps anyway. How about reduce weight instead by way of a light Borranni type valanced rim?
 
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