If you want pressure feed to the lifter/cam interface on a Commando, the usual way is to run an oil line to the left end of the cam and drill the cam down the center, with holes drilled from the lobe faces into the central feed. Dunstall is probably the best known design of this type, but others have done it, including our own comnoz. The problem with that approach is making sure the oil pump has enough volume at high rpm to feed everything. Still, with compatible materials (and quality control during production) in lifter and cam, and proper break-in procedures, the current design seems to work pretty well for most owners.
Ken