Multi-engine time logging
I got my multi-engine rating recently in a Twin Comanchee. After couple flights when I was getting relatively proficient flying the plane my flight instructor started logging my time as both PIC and dual received. He gave me a "solo" endorsement (even though the flight school doesn't allow solo in a twin) and said it was legal to log the time as PIC now. When I took my checkride, DPE didn't say anything about that either (but I didn't ask). My question is: is it legal to log PIC time while receiving dual instruction without being rated in a twin? At the time of training I only had commercial ASEL.