A PVT PLT CLBS UP THROUGH THE BASE OF THE LAX TCA CLASS B ON AN IFR CLB TO VFR ON TOP DEP FROM SNA.

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RARELY DO I FLY VFR. WHEN I DO; EVEN WITH IFR TO VFR ON TOP; I AM ABLE TO INITIATE A NORMAL TURN FOR A DOWNWIND DEP/CLBOUT TO THE NE OF SNA. ON THIS DAY I WAS VECTORED MAYBE 15 NM TO SW FOR CLB (IFR TO VFR) BEFORE GETTING CLRNC TO TURN NEBOUND TO LEAVE LOS ANGELES BASIN. I WAS USING AN ANGUS TO IDENT THE CORNER OF THE OUTER RADIAL OF THE CLASS B AIRSPACE OUTSIDE WHICH I COULD PROCEED WITH MY VFR CLB. ON THIS DAY; FLT FOLLOWING WAS TERMINATED BY COAST APCH (UNUSUAL FOR THIS TO BE DECLINED). I WAS MUCH HIGHER THAN NORMAL DUE TO MY SWBOUND CLB VECTOR. I WAS USING MY CURRENT LAX SECTIONAL; MY LAX TERMINAL CHART WAS OUT OF REACH. I FAILED TO REMEMBER OR SEE ON THE SECTIONAL OR ANGUS THAT THE LAX CLASS B AIRSPACE NOW PROJECTS OVER MY FLT PATH AT 10000 FT/7000 FT. I WAS FOCUSED ON MISSING THE 10000 FT/6000 FT CORNER BY FLYING TO THE E. BEFORE CANCELING FLT FOLLOWING THE CTLR TOLD ME TO STAY OUTSIDE CLASS B AIRSPACE. I SAID I WOULD STAY JUST TO THE E OF THE BOUNDARY. IN FACT; I MIGHT HAVE CLBED UP THROUGH THE 7000 FT FLOOR OF THE REDESIGNED AIRSPACE; THE RELEVANT SEGMENT OF WHICH I FORGOT; AND DID NOT SEE WAS THERE.