No problem filling trough dipstick tube !
Castrol 1 liter bottle had cap combined with an filler pipe fitting down in dipstick pipe. Just to put bottle upside down .
Filled her up with 6 liters , same amount I that I drained.
No leak in "steering gear" but the oil seems to follows a rubber tube going somewhere from left side of right igniton distibutor down to gearbox above right driveshaft housing. Can´t see where the tube is ending up on the engine.
Bengt