Beneteau First 41s5 (1989) New volvo 55 now with 150 hours. She has developed a major vibration in the driveline such that I cannot rev beyond 1500rpm. So upon investigation P bracket bearing within serviceable limits, so serious exercise of blocking off stern tube and undoing the dripless shaft seal to inspect the inner end of the stern tube as there is a fair amount of play at this end, what I find is there is no bearing at this end and certainly does not appear to be at the aft end of the tube. So current set up is support at fwd end is at the gearbox coupling direct to support at the P bracket. Questions, is this the standard setup or should there be an inner bearing? If standard the vibration has increased with engine hours, is this potentially due to engine beds settling in? Trying to do all this whilst she is in the water is quite entertaining but a great learning experience. Can anyone recommend an expert who would be experienced in Beneteau's?