I ordered both the GG Kiboko 30L and 30L+ models to test out for myself how well they each could fit my 600 f/4 TC (with OEM hood attached). You can see my comparison comments and photos in this post:
https://bcgforums.com/threads/whats-in-my-bag-africa-2024.35150/post-396137.
I was
barely able to squeeze the lens and hood combo into the 30L+ model, so it was a very tight fit and the bulging was noticeable (also I could feel it through the back padding when I put on the pack). I didn't even try to put my 16" MBP in the sleeve with the 600 TC inside. I did confirm that the laptop did fit in the sleeve when the bag was empty, and it "might" have fit with the 600 inside if I removed the lens hood, but I was trying to avoid that option, so in the end I didn't test that combo.
The lens and hood was
much easier to pack inside the regular 30L model. I would say that it fit comfortably with some wiggle room to spare.
So at the end of the day I decided to return the 30L+ laptop model and keep the regular 30L version. This didn't bother me too much, as it is not that critical for me to be able to carry a laptop in my camera bag. I'm not going to be hiking around in the field with one, right? There are plenty of travel options for bringing a computer along on a trip, like a messenger style bag, or a variety of other types of bags that meet the airline "personal item" criteria. I'll be perfectly happy carrying my computer using one of those options while traveling.