I'm entertaining the idea of purchasing a MB 149 OBB and swap it for factory OBBB. La Couronne du Comte states that after purchase, factory OBBB nibs are available for swap by MB.
By perfect I really do mean no hard starts, no skipping, no ink flow issues. A fountain pen must write the moment it touches the paper with no additional pressure. That is a perfect writer for me. Is this possible with such a huge tipping point? Every huge nib I've tried so far had start-up issues or skipping issues.
Sounds like you've run into feed issues. I've had that on a few, but not on my 3B or O3B Pels, or any of my MB O3B, OBB, BB, etc. The worst for me were the Conway Stewart IB near the end when QC took a dive and periodically with Visconti stubs. What ink are you using?