Reverb Stealth Connector

I've just bought a new bike off t'internet and it came with a 150mm Reverb which is about an inch too long... when the post is full in the frame, the saddle is still an inch or so too high.
So, I was going to swap it for a 100 or 125mm Reverb but I wanted to check a couple of things before I order it.
I'd like to swap the post itself but leave the hose and remote alone - but there looks like there's two different version of connector at the base of the post. The one on mine looks like a hose barb rather than the Connectormajig thing - is that right?
IMG_4919 by anthonyjholden, on Flickr
If so, do I have to order a Reverb with that sort of connector or can it take both?
Also, if I swap it carefully, am I likely to get away without a bleed?
Cheers in advance
So, I was going to swap it for a 100 or 125mm Reverb but I wanted to check a couple of things before I order it.
I'd like to swap the post itself but leave the hose and remote alone - but there looks like there's two different version of connector at the base of the post. The one on mine looks like a hose barb rather than the Connectormajig thing - is that right?

If so, do I have to order a Reverb with that sort of connector or can it take both?
Also, if I swap it carefully, am I likely to get away without a bleed?
Cheers in advance
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Good spot. A Jeffsy 27 Pro Race CF
Tried the post and sizing again this morning and whilst it's right on the limit I think I can probably get away with leaving it as is... at least until I've ridden it a few times and have a better idea.
If too high, fit a lower profile saddle.