Modern 1005 in my case, is a spring regular flex nib (Japanese 'soft')....so wetter than a nail 800. The nib is blobby and fat. The 1000's OBB's nib is 1/2 a width wider than a W.Germany 600's OBB.
There are Bock made semi-flex nib for the 1000***.............I tested one a decade ago, at my B&M vs a semi-flex nib. In there was folks saying it was semi-flex others saying it was a springy regular flex.
****Bock made Pelikan nibs from @ 1998 to a bit past 2010...some 15 years. Folks complained about Bock....and Pelikan took the nibs gradually back In-House, the 1000 was the last nib taken In-House. The exact same problems occurred In-House as with Bock.
IMO mailing causes nibs to be knocked out of alignment. Over polishing fat blobby nibs causes Baby Bottom..............many don't have baby bottom. I did in my 605, but I was getting that BB nib made a stub or CI from the get go, even before I got that nib when I swapped the M in for the BB. My M had no problems.
All the fat blobby modern Pelikan nibs....400/600/800/1000 can have baby bottom in they are over polished to get 'butter smooth'. Those nibs are all round double ball/top and bottom of the nib, thick tipped nibs. (The 200 is not, it is like the '82-97 nib.)
That is covered under your warrantee...so just keep sending back to whom you bought it from........you do have 5 weeks to exchange nibs if you don't like the size but baby bottom is a fault so it should be repairable under warrantee.
Don't hesitate to send it back.....hard start = baby bottom....no need to even check here.
I like my 600's (well the old one don't count it is 400 size) I can replace the nib with either a gold '82-97 springy regular flex 400's nib, a gold plated or steel 200 of the same flex............or a vintage stubbed semi-flex '50-65 gold nib of the 400/400nn era. The 600 is a much more universal pen. Even if the modern nib is a semi-nail.
I had a semi-flex B on my 605 for a few years.
The 1000 will only take 1000's nibs, just like an 800 will only take 800's nibs.
There are very many beautiful 600's....it is a light and nimble medium-large pen....a tad smaller than your Large Safari. Posted it has great balance and a fair girth.
My 1005 does not have great balance.
Last question, why do you want the 1000? Is it status bling? In you are jumping directly from Safari to the Big Boy.
It is a big pen....but you being from India would be use to your native big pens.