I tried a Fioroni chassis on my mbx5r it did not fit right,so I had to dremel it to
make it work. The engine mount bolts protruded from the bottom of the chassis scrapping the ground, plus it bent after about 2-1/2 months of racing.
So needless to say I'm not impressed with Fioroni's products. I ordered a BCE
Pro Lite chassis from Bill about a year ago. The BCE was alot lighter than the Fioroni and cheaper. I'm still running the the BCE it's still as straight as an arrow. You order your chassis directly from Bill the company owner, which
means alot to me. The chassis fits perfectly. Great value!