My self I race xc MTB marathon, try to train and race as often as I can.
The last month has been way too busy to ride the hours I want. But that's life.
Just a quick FIY.
If you buy your base malt from Asahi they are not selling to the public any more. I tried to order the other day and couldn't get base malt
Will depend on how much you Collected. And if your storage collecting was all sanitised before hand.
But in Short yes you can re-use. I re- pitch slurry all the time