aidanmac wrote:As a rule I would recommend not to put neutral spirit over 55% on any oak as it will tend to extract some undesirables from the wood. ........
AM

Hi Aidan
re your recommendation, I had not heard of this before.
I have been regularly soaking my 65%ABV whisky spirit on charred oak sticks (previously boiled) and also put it into the barrel at about 55%, maybe slightly 'either side' of this.
I was of the (mis)understanding that 65%ABV has been determined by industry and esp. home distillers to be a 'sweet spot' regarding charred/toasted oak maturation of whisky/whiskey and rum spirit.
So.. I would be most grateful if you could you give a bit more info regarding these 'undesireables' please (a suitable link will do), as I obviously am now confused here (not hard with me mate, I know). Thanks.