RIP, Dave.
I certainly remember him as a very fine goalkeeper in my teenage years watching Argyle.
As stated, John Leiper was in the Argyle squad at the same time as Dave and I often see him going past us at the back of the grandstand on the way to his seat. I have wondered, occasionally, when 'argyleapf' contributes on here whether that is John's pseudonym.
However, I did note that 'argyleapf' made a complimentary comment on the recent Argyle Old Boys thread about Dave McLaren that referred to his 'early days as a supporter' so I guess that dispels my notion.