Good morning Darren,
Thank you for posting your Galt line.
What I have is not exactly the same as you, but in broad essentials it matches.
Starting from your point furthest back in time,
I have James Galt born 13 June 1769 in Kilmarnock who married Agnes Harper on 4 Feb 1878 Irvine Ayrshire.
His parents were John Galt born Riccarton 21 Dec 1740 and Elizabeth Wright born about 1840 Kilmarnock.
I have John's parents as Hugh Galt born about 1715 Ayrshire and Elizabeth Adam born 25 November 1702 Galston. they married 23 January Kilmarnock.
Elizabeth's father was John Adam born 16 September 1666.
Now going forward,
I have your John who married Margaret McClymont born 28 December 1783 in Dundonald . Margaret was born 28 March 1789 and died 15 April 1848. They married 1 December 1807 in Dundonald.
Thank you for completing your branch!
I descend from James Galt and Agnes Harper's daughter Agnes Galt 6 Aug 1794 - not sure when . I must check it out! she married Duncan McCallum . I can send you more if you like. Your message has been good for me because it has reminded me I must check more on this line.
Best wishes Catherine