Here's the fix for your Viz problems...
1: find a base that isnt being attacked...
2: Pick a 109 that you want to fly. Lets say the G-6 cuz she's my Favorite.
3: select a runway but DO NOT take off. once OTR press the "[" to zoom all the way out. Then press F-10 to save head poz.
4: Do this with all of your views. Ive found that when looking back unzoom all the way and use arrow keys to "glance" over your shoulder. that way you can see your dead six.
Now as far as gunnery goes. This is what I do. while OTR you need to adjust your gunsight zoom. You know when ya press the "Z" key. Press Z then use the "[" and "]" keys to adjust your zoom. Unzoom just far enough or where you can see your ammo counter. I zoom out even further so i can maintain Viz. Remember, "Lose sight, lose fight" always try to maintain a viz on your target. Oh, and one other thing. Flying with Gunpods or gondolas REALLY trashes the flight characteristics of the ANY 109. If you take them plan on not turning at all. I'll take gondolas on the F-4 and G-10. The G-10's got enough under the hood that you can accelerate away fairly fast one you've made your pass and in they dont harm you too much in the verticle. Gondolas are good for snap shots but they come at a serious price. When going toe to toe with other fighters of the likes of SPits, La7s, Ponies, and all the other "uber" fighters out there make sure you go light. No pods, 30mm in nose, %75 fuel and a DT. Keep the DT as long as possible but when you get in the pewp ditch it and start planning ahead. Try to play in the verticle and pull negative G-loads when you can. The 109 can doing things in Neg. G-land that make other A/C's look stupid. One tactic often used by LW pilots was called the "Stutter Step". It was done to try and get the opponent to over shoot. You climb up then push the nose back down. This bleeds tons of E and if the guy behind you isnt on the ball he'll usually over shoot. You should then Roll out get your speed up then Re-evaluate. ALWAYS have the Alt adv. DONT screw around with Uber planes unless you KNOW you have the advantage. Once you DO have the advantage. FIght like heck to keep it. DONT get into flat turns...the G-2 isnt too bad but they DONT like them.
and there ya have it "Spring chicken to shiitehawk in one easy lesson. Taka taka taka taka" --Battle of Britain