The LW needs a JaBo in early war setups for scenarios and the AvA. Something other than the 110, which is good but is not capable of really fighting off Spits, Hurris and P-40s if they're flown right (or if a non-110 flier is at the controls)
How difficult would it be to modify the current Bf109E4 into a later E7? Pointier spinner and slightly higher performance, but otherwise a pretty normal Emil. Main difference being the ability to carry either a drop tank or varios droppable munitions.
It was used extensively by the LW on the Channel Coast and in the Med/NA, and was the main JaBo aircraft on the Eastern Front in the first year of Barbarossa before they were handed over to German allies (Romania, Hungary, and Croatia primarily) as the 109F and 109G came along.
from FAQs.org Bf-109E-7: Long range fighter, similar to Bf-109E-4/N but with centerline rack for a drop tank or bomb. Modifications included a "Bf-109E-7/U2" with engine armor protection, a "Bf-109E-7/Z" with nitrous-oxide boost, and a "Bf-109E-7/Trop" tropicalized fighter.
and from Vectorsite A long-range fighter / Jabo variant, the "Bf-109E-7", was produced with a rack for a 300 liter (80 US gallon) centerline drop tank or 250 kilogram (550 pound) bomb. A "Bf-109E-7/U2" modification was produced for ground attack with armor protection for critical engine systems, and a "Bf-109E-7/Z" modification was built for high-altitude operation using GM-1 nitrous oxide engine boost. The nitrous oxide provided supplemental oxidizer for the engine, with the nitrous oxide bottle placed under the pilot's seat. However, the nitrous oxide kit was heavy, and its placement disturbed the balance of the aircraft, leading to unpleasant stall-spin characteristics.
Meanwhile, in Africa, after being introduced to the theater in April 1941, the Bf-109E was enjoying the success to which it had been accustomed, racking up large numbers of kills against RAF Hurricanes and Kittyhawks. The Emil was modified for African operations by being fitted with engine sand filters and a desert survival kit. The survival kit contained food and water, a lightweight carbine, signal equipment, and other gear. The result were the "tropicalized" subvariant modifications, designated with the suffix "Trop". "Bf-109E-4/Trop", "Bf-109E-5/Trop", and "Bf-109E-7/Trop" subvariants were introduced.