ArfPros is selling electric retracts custome made for their line of ESM ARFs. Has anyone used these? I am considering removing my pneumatics from an ESM Hawker Hurricane and replacing them with electrics. Down and Locked quoted me a price of $350 to convert the Sierras I have installed in this model. That is way more than I can afford but the ArfPros are listing theirs for $150 dollars which is within my modeling budject.