I don't have a 700r, but I do have a 700 and a couple of 580's. None post but, even with my large hands, they have sufficient length not to need posting for a comfortable fit. Don't know what to say about concern for the cap. I usually just lay it down on the desk above my writing area, but if I'm making quick notes, I hold it in my left hand as I write with my right hand.
Two years later.... new member.
Just wanted to chime in on this. I wear a men's large, USA glove. My new, for 7-2019, TWSBI VAC 700R does not fit tight enough to post. But, I don't mind as the weight offsets the pen to much to the rear, for my taste. Love the caps ability to seal the nib so well! My ink starts straight-away after resting for several days. Nice pen, IMO!
Glad to have joined the FPN!
Have a nice weekend!