I just purchased 100 feet of replacement 1/8" o.d. clear PVC hosing for my Airgraver from Protubing @
http://protubing.com/ It was $12 delivered and I noticed my idle went back to the low level when the tool was new. With my Silentaire compressor the hoses soil up with oil in about 2 to 3 months and the idle begins to drop off. Even cleaning the tool won't completely help restore the low end idle.