^ Everything you say makes me believe that your tailor was/is a shyster.
On Super Numbers
This Article is a classic (and AFAIK totally accurate).
Basically making a cloth very fine also makes it very delicate. Also, you can make terrible quality cloth very fine, and you make make super-high quality cloth thick.
On your tailor
If you had a real bespoke suit then the chap should have been able to change absolutely everything - the shape of the lapels, the fit and cut of...
It's odd, but on the international stage Aston Martin seem to function as a high end European car or a low end exotic. I don't know why but in England they are considered to be a rough competitor to Ferarri, rather than a non-exotic brand.
Maybe it is latent patriotism, but with £150k to spend there is a massive portion of Englishmen who simply couldn't pass up the chance to own an Aston Martin.
One word two meanings. Originally a blazer was "emblazoned" with club/college colours, or regimental buttons. They are loud, bright and wonderful with a boater at Henley or Lords.
The navy blazer is an evolution (devolution?) of the same garment in plain blue with gold buttons.
Both garments can be correctly called a blazer.
The coat in the image is a sports coat.
I certainly never came across a customer who would admit to posting on SF.
I always found that a little reassuring. This place is great for getting people interested in suits, but if 100% of SR trade was SF based then the whole place would collapse in a matter of months.