I used LC tests with both DD's and got positives at 11dpo (DD1) and 8dpo (DD2) - I never got a feint/evap/false positive with them.

with DD1 i got a positive with FRER at 13DPO and DD2 at 11DPO..

ETA: I also poas instead of dipping it and wee splashed too, with no adverse effect

eta again! my 8dpo test with DD2 looked like the 2nd pic