No this one was for stick packs , but it was a hassle to put the battery in and out. The one posted before works very well with the FT or any saddle conversion.

If you are using the B44 saddle hold down you can try using tie rods to the battery hold down post to reduce side to side flex.

The ReflexR conversion adds 2.2 ounces. I ran a pro4 motor/ rx8 and only need 1/2 oz in the radio box to get weight distribuition 46f/54R and x-balance to 50-50 l-r.

I tried adding 1 ounce under the servo and the truck jumped nose down. To me it was very hard to control.