Maybe when Zorro implements, it will be as easy as a command like:
RenkoBrick = 20;
(to indicate a brick size of 20 pips)

Also, I forgot to mention... in some implementations of Renko bars I've seen, they've left the wicks intact. I think strict Renko does not have wicks, but there seems to be arguments about whether or not wicks could be useful.

A wick represents price clustering outside of an established brick's boundaries, where the Renko strength was not enough to form a new successive brick yet. Therefore, they would only ever appear on the current brick, or on reversal bricks I think.