IMHO, 3-4% is too low for a 42 mths project.
Some already offering 4-5% for 36 mths project. The longer the duration, the higher the holding cost. Thus they should offer something more.
Earlier on, some wisea$$ minister even quote 10-30% higher for dibs project! Lol.
I think 7% is a fair figure given their troubled start inconveiniencing their purchasers? Hehehe.