given the convenience and superior qualities of 'modern' disposable 'spin on' filters.. allied to the number of known 'problems' related to sealing and oily mess with the original multi piece cannister filters.. its no brainer to convert to modern spin on filter.. perhaps the most cost effective route to upgrade for simpler and cleaner routine servicing .. kits to achieve this are readily available in Uk for all rileys..
I feel a tad guilty that I have not contributed to this thread before, but, in a way, I have. I have posted elsewhere about the trials and tribulations I have had with the RMB Tecalamit Filter, and my efforts to 'upgrade' to a modern 'spin-on' type filter.
It is probably enough to say that, after blowing six, yes! six, 'spin on' filters apart, and spilling a considerable quantity of sqeaky clean engine oil in three streams along the road through our vilage, I have reverted to 'standard' and re-fitted the Tecalamit filter.
I do not know the reason behind these filter failures, although I want to find out. Once the world reverts to a more sensible approach to life, I will pick up the cudgels again.
My engine has good oil pressure, (bottom end fairly recently rebuilt by Formhalls) supported by a test with an independant OP gauge, but it does have an oil cooler fitted which some believe maybe contribute to the problem.
My advice concerning the fitting of a filter conversion is, at this stage, wait. I know that there are a number of options available, some of which are operating perfectly, but the behavior of filter canisters which I have experienced would lead me to think carefully about the relationship between the output pressure (and volume) of the RMB oil pump, and the pressure rating and throughput capacity of spin-on filters.