Brake Overhaul: New Pistons?

Evening all.
As previously stated, I'm overhauling the brakes of my XBR500. Now, providing I get that damn snapped bolt out (more a question of time than willing), the next step (once all the necessary bits are accumulated) will be to actually strip the caliper to bits and start rebuilding it. It's all pretty manky in there; 15 years of accumulated crap in the uppermost reaches of the caliper body to remove, and more importantly, the same level of crud on the exposed parts of the piston, so they'll need attention. But, since I'm overhauling the (non-leaky, previously-functioning-if-a-bit-poor) brakes, would it be better off just fitting new pistons (2 of, at £8 each from David Silver Spares)? Would there be anything else - seals aside - that I'd be better off replacing whilst I'm in there?
Thanks

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TiT#146A
B Wybrow Motorcycles (Essex) | Thurrock Motorcycle Training (Essex) | David Silver Spares
Rates Ford (Essex)

There ain't nothing else in there mate

Might be worth running a tap down the bleed nipple hole just to clean the thread up, and fit new or wire brush the existing nipples.

fastfitter wrote

There ain't nothing else in there mate

Might be worth running a tap down the bleed nipple hole just to clean the thread up, and fit new or wire brush the existing nipples.

Eyehtangewe.
I was considering new nipples (hmmm...), so ta for the confirmation - new nipples it is then. When you say "tap", is that a plug tap I presume?

When it comes to a brake overhaul, is there anything I should be aware of, or is it just a case of using my head, making sure everything is spotless (inc. the seal grooves - search is fab ) etc, etc?
Cheers.

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TiT#146A
B Wybrow Motorcycles (Essex) | Thurrock Motorcycle Training (Essex) | David Silver Spares
Rates Ford (Essex)

Yep, a plug tap. The bottom of the thread is tapered for the nipple seat but it's quite sharp, and it's only usually the first few pitches of thread at the top that get crudded up.

This should cover it........

Woah! Thanks FF - duly saved and printed for futre reference.

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TiT#146A
B Wybrow Motorcycles (Essex) | Thurrock Motorcycle Training (Essex) | David Silver Spares
Rates Ford (Essex)