Risky, but worth it!
I want to preface this by saying the custom sword builder is a bit of a risk. Why? The handles. I got myself a gladius handle with a short blade (diamond 8 single fuller, I believe), and I am very satisfied. That being said, my partner found the grip did not conform to her hand shape (as you can see, it has a very specific space for you to grip). You can make some funny combinations in this sword builder, but not all might work for your hand. Thankfully, it conformed to my hand very well, almost perfectly.
Furthermore, it is the correct length for a gladius (or thereabouts), even if it is not wasp waisted. Alas, if there were options for waisted blades here I would buy more often (I fear, the purse is not so hefty as it might be in these trying times). But perhaps I am lucky there was no wasp waisted option, because the balance with my setup here is perfect. I have a few other of Cailmacil's single handed swords, the Sanguis and Solin ones (as seen in the picture), for sparring, but I find their point of balance to be very blade heavy. This is probably more a technical limitation, but it can make them feel a bit cumbersome. The difference is, they have long sword blades and my new gladius has a short sword blade. The balance is excellent (if not historically accurate, I cannot say), being at most a few centimeters (or about an inch) from the guard, which makes for surprisingly deft handling from a foam sword. It feels livelier than the others I have used. Ironically, a gladius should perhaps be a bit more blade heavy, but I won't complain because it is wonderfully fun.
Fit and finish was not really a concern for me, I just wished for a suitable plaything, not a piece for gazing at, but I can't complain.
All in all, I'm perfectly satisfied with this one, but be careful when making it and consider the effects the handle