Did a test with a bit more heat with a fresh OEM HP toner cart for the 1102W printer.
Very solid transfer and etch, no pin holing in the fills , did not use the extra foiling step. 5.5" x 3.25"PCB with SOIC part (28 pin) in centre and 0805 SMT parts.
Also on ALIEXPRESS search for M0.9*2.5 Copper Hollow Rivet , to make handling vias simple.

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