Ruben is a great guy, I have known Ruben for about 12 years and he has built about 12 to 15 tanks for my personal use and I have never had any problems with any of them all the seems look great and have never failed. As for the sumps, again never any problems. Ruben has over 30 years working with acrylic and he knows what he is doing so if you ever need any thing built or custom work done I would recommend him to anyone he does great work at a fair price.
I hope this helps