I've been out of racing for about a year and decided I'd get back into it with a new build, but I can't decide on whether to get a B5 or B5M and I don't want to get both of them. I plan to race mod buggy on a small clay indoor track with tight turns and medium-to-high grip. I've had every version of RC10 since the original gold tub chassis and I tend to throw my buggies around the track so I'm leaning towards the B5, but B5M's have been selling like hotcakes at the local track this week. Any feedback would be appreciated.