[Jacques Reed]

Hi Mike,

Thanks for that information regarding thinner Spanish made IBS cups. It made me go check my spares box.

Luckily the rear ones were the correct thickness NOS ABS items but the front were the Spanish IBS as pictured.

Even without measuring, the IBS cup on the right is noticeably thinner than an earlier original sample on the left.
Measured as best as possible on a rubber part: 0.350" vs 0.315" = 0.035"

Not a lot, but enough to cause problems with sealing obviously.

Cheers,