Update , I procrastinated on fixing the fuel weepy carb and went and changed the metal heat lines for water heating . 1/2" radiator hose from the water pump, thru the intake hot box to the temp sender fitting.
In a way it is an improvement , once the engine is up to temp, but , of course , it takes WAYYY too long to happen and so is generally unsatisfactory.
So , I decided to endure the toxic aftermath and change the carb.
The 20min job took 4 hrs !!
First carb would not idle , dismantled it , cleaned (air blast) reassembled , still no idle.
2nd carb, idled perfect , no throttle responce . dismantled , cleaned , replaced the accel pump leather, reassembled , still no throttle responce.
3rd carb , ugly , pored fuel down the throat , like the float was stuck down.
Getting pretty done in by now ,
4th carb , stripped it first , cleaned , again just blew high pressure air , not optimum I know , but soaking in thinners etc just is not possible for me. The petrol its self is more than I can cope with.I resized the idle tube end , sealed the copper washers , bumped the copper plugs per Jons instructions (thanks Jon) the originally leaky carb now seems to hold fuel mostly where its supposed to . Idles perfect , instant off idle throttle response . Very happy , take it for a drive .

NO POWER ! up to about 1200 rpm all is good , then it is just flat , pulling the choke a bit helps, but I am over it now. gotta repair myself . Sleep this [censored] off.