Huevos Huackos is an eggbeater exercise that works the rudiment in the context of straight 16th-notes before adding 5:4 and 5:3 tuplets and ultimately throwing in backsticks.
Backsticks in eggbeaters are a little tricky, but they can be a lot of fun. The secret is to relax the left-hand fulcrum (where you clamp the stick in the web of the hand between the thumb and forefinger) and let the stick slide out a little bit, so that your fulcrum consists more of the actual thumb and forefinger gripping the stick. This allows you to still get the diddles with the bead of the stick while being able to flip to the butt and engage the back fulcrum to get two quality backsticks. Backsticked diddles generally require a back-fulcrum approach, because the front fulcrum doesn't have enough stick in front of it to get a good rebound. By moving the fulcrum for the non-backsticked diddles, you make it easier to make a quick switch to that back fulcrum to get diddles with both grips (see photos below).
