Red26,
the term "Boom&Zoom" can be misleading as far as the 205 is concerned. Dont use the old classic "Boom&Zoom", good for FW190s and F4Us. Use instead a "Hit&Climb" technique: shallow dive up to 400-450mpg TAS, never go below the enemy, hit and extend with a soft climb or spiral climb. Keep as much E as you can pulling up gently, since the DB605A of the 205 doesnt have any MW overboost and doesnt allow very good sustained climbs. Again, practice with 109Gs and K, they are a very good training for the 205.