Big Tabs
looking backwards, going forwards
I’d advise against clamping too as there is a real risk of squishing the vinyl.
I would advise using clamps.
Without using clamps there is a risk of causing movement when moving the glass sandwich from oven or lawn…
There is a distinct difference between clamping with adequate force to prevent movement, and the pressure one would need to ‘squish’ vinyl.
The fact that one is clamping glass encourages one to be frugal with the force applied.
In my experience, I have never managed to squish a record with the method I have described.
Oven temperature is the key, 30° to 40° C. being useful - try not to get near 55° C. +