Using a 1-2-4-8 unit Progressive System when one has an advantage...

Hi Guys, Happy New Year to all and Good Luck

Assume you have a 2.5% advantage over the house,

Question 1: Would you recommend using a progressive system where you double your bet after every loss (1-2-4-8 Four step then you abandon and start again) only when you have an advantage.

Question 2: What sort of bankroll would you require (in units)?

Question 3: If you use a progressive system with an advantage, what would is your expected value per hand?

Thankyou for all responses,
- MJ -