T
tamz
Use a stanley.
Run it down tight on one side and cut off the 5mm that goes in the rebate and if it is rebated into a top rail cut that too and if rebated into the bottom cut that. Then knock the back out to break it off the staples or screws that are holding the bottom on (if it is rebated you have cut it) then lift it out.
Do what you need to do then screw 2 fillets onto the sides then another fillet jambed tight on the bottom. Trim the back board to suit then refit it held with a couple of screws (use screw caps if it turns you on). A smear of white silicon around will fill any bad cuts.
Simples.
Run it down tight on one side and cut off the 5mm that goes in the rebate and if it is rebated into a top rail cut that too and if rebated into the bottom cut that. Then knock the back out to break it off the staples or screws that are holding the bottom on (if it is rebated you have cut it) then lift it out.
Do what you need to do then screw 2 fillets onto the sides then another fillet jambed tight on the bottom. Trim the back board to suit then refit it held with a couple of screws (use screw caps if it turns you on). A smear of white silicon around will fill any bad cuts.
Simples.