Well I have a Getaway Ive disassembled for that purpose.
Only 3 things have halted the progress of this project.

First, I still have to get a new batch of H2O2 as my old batch was bubble free already ( so I guess , yeah that answers the other query - it looses strength in time.
Second I need a bigger jar with a glass top, coz my available jar wont fit Getaway's parts.
Third, Need sun, it's been gloomy since it's winter