Start with eCPPT or straight to the OSCP?

I've read the threads I could find on taking the eCPPT before the OSCP, but the did not seem to apply to my situation.
My Background:
I have a BSE in Computer Science and Engineering and have been working designing and developing software and systems for 20 years. For the past 14 years I have focused on secure software and systems development, working with the DoD. I have experience writing C and C++ code, and did x86 assembler in college. At one point in time I ran the Unix security program for a state university, so I'm also familiar with most networking concepts, but have not worked implementing anything in many years.
My Motivation:
First off, I do not want to be a professional penetration tester. I will eventually get the OSCP cert, just because I want to and getting it is a goal of mine. In addition, I think that if I better understand penetration testing, I will be able to do better job developing secure software and systems. I do the standard OS and network scans mandated by the DoD, but the software systems I develop are not directly tested. Instead of just running a tool to identify my applications vulnerabilities I would also like to understand the why.
So, the question is, given my background, do I start with the eCPPT and then do the OSCP, or do I just start with the OSCP? Money is fortunately not a factor and I can afford to do both.
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Paul
My Background:
I have a BSE in Computer Science and Engineering and have been working designing and developing software and systems for 20 years. For the past 14 years I have focused on secure software and systems development, working with the DoD. I have experience writing C and C++ code, and did x86 assembler in college. At one point in time I ran the Unix security program for a state university, so I'm also familiar with most networking concepts, but have not worked implementing anything in many years.
My Motivation:
First off, I do not want to be a professional penetration tester. I will eventually get the OSCP cert, just because I want to and getting it is a goal of mine. In addition, I think that if I better understand penetration testing, I will be able to do better job developing secure software and systems. I do the standard OS and network scans mandated by the DoD, but the software systems I develop are not directly tested. Instead of just running a tool to identify my applications vulnerabilities I would also like to understand the why.
So, the question is, given my background, do I start with the eCPPT and then do the OSCP, or do I just start with the OSCP? Money is fortunately not a factor and I can afford to do both.
--
Paul
Comments
I suite of tools I'm responsible for includes custom applications and web applications. All of my tools run on classified networks, so public attacks are not really an issue, but insider threats are a major concern. I have looked at SANS secure development course. Cost is an issue with that class, so taking it right now is not an option.
The one that go straight and fight a lot until you get something, until give you the click.
Or
The one that likes to build up the skill slowly until you reach your target.
If you like the option 1 then OSCP. If it is the second option then go first eCPPT > OSCP
It is your personal IPS to stop the attack.
I would advise testing the waters in something a little less intense such as elearnsecurity PTS and getting the EJPT certification, CEH, or if you have the money SANS GPEN.
OSCP is know to crack skulls and be very hard for those even with basic pentesting experience.
Good luck!
2023 Cert Goals: SC-100, eCPTX