To be honest with you , i really see nothing wrong with how you have it , you open the back doors and all you need is there in front of you , not much you can do in my eyes , once you get that tank in job done .
Sure , you can make it look more pleasing to the eye , thats for you to decide , but functional wise you are there !
I have spent 12 years messing about with layouts , multiple reels , roller systems , astras , combos , T4 , now im back to Fiorino/Bipper/Nemo size , i open the back door and its all in front of me no more climbing about !