Does n e one have advice or tips on how to have a better double stroke?

Yes Joe gave you the good link. The good way of getting better double strokes is that you practce double strokes with pauses so you pay attention to the second stroke also. Check out Marks page. He describes it the best.

The key to double strokes is clearly the second stroke - usually played with the fingers. There are a number of exercises to strengthen and build control in your fingers. One - which can be found in Gary Chaffee's books - is to hold the stick between the thumb and index finger and then play a series of rhythms (8th-note triplets, groups of 16ths) with each finger successively. For instance, one group of 16ths with only the middle finger, then one with the third finger, and so on. Then switch it up and change the order. Remember to keep the other fingers off of the stick (slightly) while playing the figures.

Another exercise (I think I saw Plowboy mention Morello giving this one to his students) is to hold the stick between the index and third fingers and play bounce strokes with the fingers - bouncing the stick in the palm of the hand.

I've found these isolation exercises to be quite helpful. There is no substitute for practice, and a copy of Stone's Accents and Rebounds, however....

i'm feeling like a retardo here.  can you explain this more?