I am extremely sorry to hear of Bert's passing.
He was very active on the site when I joined in 2013, helping my restorations on many occasions. We seemed to share a common understanding of engineering and sense of humour. A rapport developed through posts and emails. He was noticeably less active on the site over recent years so I was pleased when he posted on the 18th Dec 2020 and this news of his passing comes as a shock.
Rest in peace Bert, you will be missed.