Rerolling Exploding dice

So i am trying to get roll20 to reroll the exploding dice when but as you can see from the image, when it rolls for the exploding dice it does not reroll the 1s or 2s. Is there any way to get this to work or is there no hope and i should just do it manually. For the record i also tried to do it 6d6ro<2! and it was no different

Remove the space between the 6d6! and ro<2. 

It should be 6d6!ro<2

What Gauss says, but also you might want to use !! instead of !.

Edit: Turns out reroll once does work with explosions but not the way OP required and comes with it's own display bug.

It should be noted that the reroll once modifier is only applied to the initial rolls once per explosion chain. Rolls added by the exploding modifier will not reroll don't get their own reroll once modifier but share one with the rest of the chain. This behaviour is difficult to notice since rerolls of exploded dice are shifted in front of the explosion chain. If you want the exploded rolls to reroll once current syntax doesn't allow it. A workaround is to count explosions separately that explode at a probability that accounts for the reroll once.

This can be handled as thus

{6d9>8!>8}*6 + 6d5ro<2

A d6ro<2 will hit a 6 two out of nine times (thus d9 exploding on two values)

The final d5 represents the final non-exploding part

GiGs said:

What Gauss says, but also you might want to use !! instead of !.

I don't recommend using !! with any reroll modifier; when a compounded roll hits a reroll value it drops the entire compounded value and rolls anew rather than just rerolling the last die added

Thank you Rainbow this is what I was looking for. I saw posts from about a year ago asking a similar question to me and no body had a concrete answer. So is there any hope roll20 will make adjustments to implement something like this? Or is it hopeless?

Ryan B. said:

Thank you Rainbow this is what I was looking for. I saw posts from about a year ago asking a similar question to me and no body had a concrete answer. So is there any hope roll20 will make adjustments to implement something like this? Or is it hopeless?

I wouldn't say hopeless. I'd say don't wait for it. There is an open suggestion for custom dice syntax that could handle this so I'd recommend adding your voice and vote to it.