I have read posts on weep holes in the clutch casing and I'm considering drilling the case. There is a small weep on the gearbox/clutch mating surface and (if I read the posts correctly) a weep hole will help prevent the clutch being damaged with oil. Please correct me if I'm wrong. Advice on performing the said deed, and an accurate description of where EXACTLY to drill please. I'd hate to get it wrong....