Concrete and Rebar: Rollers

[redir]

So I am looking at eMotion vs TruTrainer reviews all over the place as I want to get some rollers for this winter, smart rollers.

I like the flywheel that TruTrainer has. I have ridden them in indoor competitions before but I have never ridden the eMotion ones. The flywheel gives an incredible real road feel to riding rollers but it's still tricky to get up and sprint. Seems like the eMotion ones have that locked down but they don't have the flywheel.

That got me to thinking. It got me to thinking about my current rollers. If I fill the rear roller with concrete and rebar and or ball bearings or something like that do you think that would mimic the TruTrainer flywheel?

We can also make this a TruTrainer vs eMotion thread too. I'd love to hear from your personal experience on either one of these.

Regards.