Filter caps capacitance, should I increase?

Hello,

I am going to ask a question about a subject that I am sure have been covered a few time.

I am recapping a Revox B750. It originally comes with 4x Frako 4700uf 63V. They are roughly 35x55mm.
I have purchased some CDE in the same voltage and capacitance. They are much smaller (30x30, here is the part list https://www.cde.com/resources/catalogs/380-382.pdf )

The old Frako measured at 4400uf after 50 years, the new CDE at 4100uf. Although within the 10% tolerance, I was a bit underwhelmed.

So my question now is, should I buy another set of caps, say 5600uf which I will assume may measure at 5000uf or simply stick with the CDE?
I was thinking of the Kemet ALC70 or ALC80 in 100V that draw much more current and should fit since I have the space ( spec list https://www.mouser.co.uk/datasheet/2/447/KEM_A4081_ALC70-3315930.pdf ). I am sure I could push to 6800uf but I don't want to stress the rectifiers too much.

Most importantly, would I really hear any sonic improvement?

Thank you
 
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Large modern caps always measure at the bottom end of the tolerance range is my experience. I guess the manufacturers control their proces so thight these days that they afford to do that, saving them material and money.

Would be more fair to sell them as 4100uF +/- 5%..
 
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