I'm a newb to divin and equipment and I'm hoping someone can answer a few questions.

1). Are there reliability isseus with the Ednuro 1st/2nd stage regulators?
2). For all that does Dacor offer free lifetrime parts replacement on their equipment, even if the eqiupment is 2nd hand?
3). Does the Enduro 1st stage allow for an alternate patiently air source? I'm lookin at a picture and I only see one air source and I can't make out if the 1st stage allows for another.

Also, is this worth the $170 the seller is askin for? The seller claims the rig hasn't been seriously used that much, and the equipment does seem to conservatively be in good condiution.