Vintage DD turntables. Are we living dangerously?

@lewm Here is the SAEC manual in English if you can read it.
and another page. Someone just posted it online, so i can share his images here, hope it’s ok.

He said that drilling and screwing it’s for wet playback technique, wow

READ HERE

I certainly owe Raul an apology for doubting him.
Raul, I apologize. Wherever you are.

SAEC also do not recommend to use record weight (disc stabilizer) on top of the disc according to the manual as it will reduce the effectiveness of the solid mat. So we did everything wrong :)) 

Who will be the fool who will pierce his vinyls having this mat?

Vinyl was too cheap in the 70’s ?
Record dealers drilled sleever and cut corners on the sleeves to mark discounted vinyl, but drilling record labels is something strange, maybe not strange for Japanese ? LOL

Why disc stabilizers are not recommended by SAEC for their Mat ?
Disc stabilizers (record weight) were very popular in the 70’s/80’s

Without record weight drilling is the only way to fix the record to the mat to avoid slippery according to SAEC

I prefer weight on top, no drilling for sure.
I thought SAEC provided that metal bridge to fix the mat to the spindle, i was wrong :( 

SAEC also warned up: they do not recommend to use tape, even thin tape under the mat.