Howdy! What everyone seems to do in order to eliminate wheel hop as much as possible is to install a dogbone mount insert (such as the 034 motorsport one, the Forge one or the APR one, even the Powerflex one you mention) and then change at least the front tyres to some really decent ones - most people go for Michelin Pilot Sport 4 S tyres, but others have tried many other ones and rate them just as much.
The dogbone insert is an easy mod, but after seeing what it done to my mount itself, I’d strongly recommend upgrading to the full dogbone mount kit from companies like Revo, Racingline, ECS (to name a few). It upgrades the whole mount rather than just placing a bit of metal into the mount to prevent movement.
@Legojon can vouch for vibratechnics mounts,
@theoldboy can vouch for Revo mounts, and I can certainly vouch for Racingline ones.
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