In my view the Bleazey mod to the Centa couping is a no-brainer as without it, replacment of the rubbers (a service item in reality) is a comple/expensive engine out job. There is debate on the merits of a "full" vs "part" Bleazey (whether or not to improve the connection to the splines on the crankshaft as there have been failures - we opted for the "part" one as we have had no troubles and we did not have easy access to a lathe big enough to do the job.
