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Brass is not as durable as PB but drawn brass tube is readily available.If the engine is not going to be used heavily would it be OK?
Off Topic ..AS:'Price of diesel' ? At least you're probably getting a decent MPG Last time I went home from Jo's in my diesel Forester: 175m, 3h20m. 60.2 mpg. The new petrol one: 175m. 3h40m 38.8 mpg. I feel I'm propping up the world petrol industry at my own expense. Woe is me ...