Life is short, use your RH-1 as much as you can, handle with care but don't be afraid to take it out and enjoy it. I carried mine around for 5 years always in its sony bag, carefully stashed in my carry, rocking glorious PCM through Sony EX-700 IEMs. Best 5 years of my portable audio life. I decided to move the RH-1 on and focus on original MD recently. I sold the RH-1 for a good price because of its pristine condition.
Handle with care, but USE it, it's supposed to be used and it IS a PORTABLE unit..!!
Paul, how is your RH-1? The supplied earphones are actually decent but I hope you have something even better to truly bring out its brilliance.