CB undrilled case boring question

[karl h]

has anybody bored the spigots of the CB case to 100mm without braking into the oil galley? (spigot dimension for 94s are 97.25) according to my measurements the galley is 11mm, so when using a 100mm spigot there would be 0.5mm room to the left and right of the galley, so it depends on how accurate the galley is centerd between the bores. thought about sleeving the bore to 10mm inside diameter (like the pump side of the oilgalley that leads to the cooler)
any thoughts or experiences?

[karl h]

anyone?