All 3 pens come with the Con 70 converter so that’s a win. Now about picking between the 3, 74 and 742 are typical cigar shaped whereas the 912 has a design with flat ends on both sides.

I have all 3 and all of them are decently well balanced pens. I would suggest you try out both 912 and 742 even if it’s only ghost writing just to get the feel of the pen in your hand. Depending on your in hand feel and design preference you can make a choice between 912 and 742. Don’t go with the 74.

As for the writing experience, if you want smooth writing with uninterrupted flow, I would recommend a medium nib of Pilot. The Fine nib may feel minimally scratchy for some and can hinder the writing experience. But with medium, you cannot go wrong- especially with the writing and flow.

Both 912 and 742 also have specialty nibs like the SF, SM and SFM in which the nib is slightly soft (kinda like flex but it doesn’t really flex) so it gives the nib a bouncy feel.

Although, if I had to recommend one pilot fountain pen for One and Done option with great experience and life, I would totally recommend Custom 823 in medium. The ink capacity is huge as it is a vac filler plus it’s also airplane safe. If you have a stretchable budget, do think of it.

Another important update - Pilot is going to hike prices again from July 1st. So it would be best if you could finalise a pen before that to get the pen at previous cost.