Need expert advice: camshaft lubrication issues

[joselu43]

A couple of weeks ago I had the valve stems seals replaced on the boss's 88 560SL. This monday morning the car would start and die making a pretty loud grinding noise. Pulled the driver's side cover and I found that the mechanic had improperly replaced the oil feeding tube and the 2nd & 3rd bearing were oil starved. Cleaned things up and attached two plastic tubes to the feeding holes and filled them with penetrating oil. The oil went down, and repeated the process several times. This morning I fed it regular oil, removed the spark plugs, oiled the cams and using the starter I rotated the cams. Repeted the whole thing several times. There is no noise and the cam rotates freely. I think the No. 2 tower is still pretty tight and the oil drains pretty slowly through it.
Here is where I need your advice:
Is there something I can do to improve things?
Should I replace the bearings? I am not worried about the cost as much as I am about the possibility of creating a larger problem when doing the job (As it happened with the seal replacement)

I will aprecciate your advice. Thanks.

Jl