Few questions about tuning the Marauder and parts

[TFB]

I posted this on the Marauder site but didn't get too many responses so I'm going to retype it here.

1.  Ordering some spare parts.  I'm going to order a few breech O-rings and a few breech gaskets "just in case".  Is it best to just order them from Crosman or is there a better place to get them?  Higher quality?

2.  Hammer Springs.  Is it worth it to get an after market hammer spring?  I have seen a side by side of the stock and the aftermarket one and the aftermarket looks beefier.

Now onto the tuning aspect.

I really don't know how it was tuned or if it was tuned at all.  I have contacted the seller (bought it through GTA) to see what he had done.  I plan on putting it back on stock and tuning it myself.  Nothing against MLM, but I want to make this rifle mine.  Plus it seems like a fun project.

How do I get it back to stock?  How many turns out is the stock port valve setting?

[Brewerja]

I could be wrong but i think stock is half on everything. An old carburator/scope centering trick is to crank full one way till it stops, then come back the otherway counting your clicks/turns. Take that number and divide it by 2. That will give you the center and a good starting point. Hope that helps dude.

[mlrs_27m]

I sent you a message as soon as I was notified I had a message. It doesnt look like you got it. As I explained before, I set the hammer tension and hammer stroke back to factory settings. I had the velocity one turn out. I posted what I had done in the original listing. That setting gave me the best power/shot count/ noise. I was shooting that setting for a few months. I also had excellent accuracy when I toned down the fps, JSB 15.9 were shooting 780 fps. I never tuned it to its full potential, because noise is an issue, and it was just to loud at max. Hope this helps.

[TFB]

I did get your message.  I just didn't have a chance to reply.  Thanks!  It helps a ton. 

I should have copied the original message but you edited it out. 

[mlrs_27m]

I wasn't sure if you copied it as a reference. I forgot to throw the chrony string with the settings in the box. Have you put a scope on it yet? How is the tuning going?

[TFB]

Well there are a few issues.

First, I can't find a place to shoot it because most of the ranges are too short.  They're mostly designed for pistols around here so 25-50 feet max.  Even if I could find a place to shoot it, I can't bring it there.  My state says that if you are transporting a firearm, even an air rifle, it has to be unloaded and trunked.  I do not have a trunk (SUV) so I had to buy a case from PA.  I'll toss a lock on it and it will be good to go.

Problems still exist.  I had no idea high rings were so high.  I need to install a rising cheek comb.  Then I can finally shoot it.  LOL.

[mlrs_27m]

Wow. You do have issues. you seem to be pretty restricted out there. No rifle ranges around you?

[TFB]

There are but they are about 40 minutes away.  Can't do anything until I get my case.