Hi Andrew and welcome to the forum. I'm sorry you had to join it this way.We never know what future has in store for us, right. But if it's any consolation, if you're 'hangning around' with Hanger guys, you're surely in cabale hands.
So it's your third month....but if you really think about it, you're not 44, you're actually three months old with a 44-year-old mindset. Isn't that exciting? I'm sure you know what I mean.
Back to the C-leg and this OB's state-of-the-art X3 'killer'. I've been on the former for almost four years. I'm 45, right AK, by the way, and I can't say I'm limited in any activities I used to perform before the amputation. Biking , walking on slopes or different kinds of uneven terrain are no problem, not by any means. Though swimming in the C-leg is out of the question. Other than that, you'll really get used to 'use' it to take the most of it.There's this feature in the C-leg, a standing mode, that I sometimes find particularly helpful. You can lock the knee agianst flexion between 7 and 70 degrees. It can help you save a lot of energy if you have to stand for longer periods of time.
But make no mistake about it. No matter what kind of fancy-schmancy high-tech X-whatever $80,000 worth of killer-leg you have, the most imortant thing is a well-fitting socket.( Wow, that was one hell of adjectivilal premodification, was it not? ) You won't go far without it.
Of course, not everything will be the same. That's what I meant by that three-months-old age. You basically have to learn how to walk again, and unfortunately in our case ( of transfemoral amputation), it always results (again) in greater energy consumption during ambulation compared to transtibial one.
Generally, like they say, things always have to get worse before they can get any better. I'm sure you'll be no exception to this rule and you will get your life back on track again soon.
Hang on in there, buddy, and keep everyone here posted on your progress.