That recipe looks yummy!
Anyway I used the Tinkyada brown rice lasagna noodles except that I didn't cook them before I made the lasagna, it didn't get gummy that way. Just make sure that the sauce that you use covers the noodles so that they are able to cook.
I came across the Tinkyada brown rice lasagna noodles last week and made a vegetable lasagna with them last night. It was delicious!
I didn't follow your advice to use the noodles without cooking ahead of time, although I didn't boil them as much as the box called for. It was still really good, but the noodles were a bit soft. Next time I won't cook them in advance.