You never know... we have not had one bit of problems with the Canton remote adapter. Can't recall if we had to torque it extra hard or not. We DID make sure the filter plate on the block was sealing well before we put the Canton piece on.
If I was the OP, I'd try this first...extra torque on the Moroso adapter's center bolt. Just increase it a bit at time and see. You might be able to grind an open end wrench thinner and bend it a bit to get in there.
