Welcome Kurt. Age gene to beat here too! I didn't regular deadlift for my first six months of HST but I squatted and SLDLed 3 x weekly and made great progress. Once I got into heavy deads, though, I think my back started to strengthen and thicken up more. That is something I'm really glad I did as my lower back is now stronger than it has ever been. So, I'd definitely recommend incorporating regular deadlifts at some point in the future. I look forward to reading your log.